Sites using MediaWiki/en

''This is an incomplete listing of sites that are using MediaWiki and that are written or provided in English language. For wikis in more than one language (including English) see the multilingual list.''


 * Feel free to add your site to the list, but please stay close to the given format:


 * Please keep the description short and free of advertisement. You don't have to state that your site is "a wiki about ..."; all listed sites are wikis.
 * New entries will be checked. Unreachable sites or sites that don't use MediaWiki will be removed.
 * Last complete check: 2006-02-11

Wikimedia Wikis
Due to the large number of Wikimedia foundation wikis (Wikipedia, Wikiquote, Wiktionary, Wikiversity, etc), they are not included on this list. For a list of projects, see Sites using MediaWiki/Wikimedia. For the complete list with all languages, see this page.

#

 * 350z Technical Guide :Info on the Nissan 350Z and a few other cars.
 * 43folders :Productivity and time management practices, "life hacks and other smart heuristics", and more!
 * 303dia :Nonsense at it's best.
 * 3D Game Comparison :Game vs. game. No hype; just facts.™ Compares various 3D computer/video games attributes/features: 3D engines, player characters, level/world design, weapons, NPCs (non-player characters), inventories, and more.
 * 9Dragons Wiki :A wiki dedicated to documenting every aspect of the MMORPG 9Dragons.

A

 * Aboutus.org :Information about websites on the world wide web
 * Accident Designs Wiki - wiki.accidentdesigns.com :Knowledge, ideas, code an other accomplishments. Mostly about Second Life, however also about web development, design and more.
 * AccessNotes - http://www.myaccessnotes.com :The future of note taking; powered by students.
 * Achievo.org - achievo.org :Documentation of the open source projects Achievo, Achievo ATK and Achievo WDE.
 * Active Worlds Wiki - activeworlds.wikia.com: General encyclopedia for the 3D, online, chat-build, multi-user environment Active Worlds.
 * AdCiv.org - AdCiv.org : Advanced Civilization and post-scarcity enabled by open-source design and engineering
 * ADG Art Direction Wiki - wiki.artdirectors.org :Online community and knowledgebase relating to new and classic technologies relevant to the art of film design.
 * aDTVinfo - adtvinfo.bacco007.info :Australian Media
 * Agora Opus - agoraopus.org :Technical analysis
 * AiDKlinik Wiki - AiDKlinik Wiki : Drug safety system
 * AIDS Wiki - AIDS Wiki :AIDS dissident website
 * Aion: The Tower Of Eternity Wiki :A wiki dedicated to documenting every aspect of the MMORPG Aion: The Tower Of Eternity.
 * AirsoftWikiNZ - www.airsoftwiki.icebytes.co.nz: NZ specific wiki on the sport of Airsoft
 * AJS.COM - AJSWiki :Personal site; gaming topics; mushrooms and mycology
 * Akron Wiki - wiki.coolpeoplefromakron.com :Akron's only wiki, featuring cool local goodness that only Akronites would know
 * ALA Chicago 2005 - meredith.wolfwater.com :The 2005 ALA Annual Conference in Chicago (unofficial wiki)
 * Alfresco - Alfresco.org :Document Management System
 * Alfreton Town - Alfretonwiki.co.uk : Alfreton Town Community Wiki, Alfreton town, Derbyshire, UK.
 * AAH - AllAroundHalo.org :A Halo wiki.
 * Alloscomp Wiki - :Small, gaming-clan based wiki
 * Allotments4All - allotments4all.co.uk :Allotment and Gardening discussion forum using Joomla, SMF, and mediawiki
 * Alt-StarFleet-RPG Bureau of Information - boi.alt-starfleet-rpg.net :Star Trek-based shared fiction writing club wiki
 * Anarchopedia - Anarchopedia :Anarchopedia is an open knowledge-portal and online anarchist community.
 * Amusement Wiki - editthis.info/Amusement :Wiki created entirely for fun. It should not be taken seriously!
 * Ancestor Notes - AncestorNotes :A wiki where people can post history and other information about their ancestors. Posts about ordinary people are allowed.  They do not have to be famous, though posts about famous people are welcome too.
 * Andongkim.org - Andongkim.org : Wiki about the Andongkim Korean Family Clan, History, and lineage.
 * AngelusFacts FraudNet Wiki - rolandmthomas.com :An anti-fraud site for victims of serious economic crime in St. Kitts, West Indies
 * AngelWiki.net - AngelWiki.net :A wiki covering all aspects of Angelman Syndrome, edited by subject-involved people.
 * AnswerWiki - AnswerWiki.com :A free user generated question and answer portal
 * Appeal - appeal.kde.org :Progressive development and organizational concepts as applied to the KDE project
 * Appropedia - appropedia.org :Library of appropriate technology, with textbook style topics and how-to style projects.
 * Aquaticdatabase - aquaticdatabase.com : A database aimed at aquarists. Previously a database of the phylum cnidaria
 * ArchivesWiki http://archiveswiki.historians.org : A directory of archival institutions around the world.
 * Arcapedia - starcadia.sasoriza.us/wiki :Devoted to the Star Trek: Arcadia interactive fiction group and all of its spinoffs
 * Archlinux - wiki.archlinux.org :Linux wiki
 * Armadeus - Armadeus.org : Open & embedded Linux systems development
 * Armeniapedia - armeniapedia.org :Information about Armenia
 * Article Alley Wiki - articlealley.co.uk :Article Wiki site
 * ASCEND - ascendwiki.cheme.cmu.edu :A free mathematical modelling program for science and engineering.
 * Asian Business Round Table - AsianBusinessRoundTable.com :Resource guide for Asian business owners, entrepreneurs and executives.
 * AskDrWiki - askdrwiki.com :A Medical Wiki for practicing physicians, residents, and medical students.
 * AskWiki - askwiki.com :A natural language search integration of English Wikipedia.
 * AstroWiki - astrowiki.org :An open content encyclopedia on amateur astronomy and telescope making
 * Athlepedia - FatalFitness.com/Athlepedia :The premier health and fitness wiki.
 * Atléticopedia - wiki.atleticomadrid.de/en :Club Atlético de Madrid S.A.D. wiki
 * Aussie Ugg Boots - aussieuggboots.com.au :Sellers of genuine Australian Ugg Boots.
 * AutoFinance-Ez.com - Instant Auto Financing : Online Auto Financing
 * AvatarRP - AvatarRP.info : A fansite for Avatar the last airbender
 * AvatarRP/Poetry - poetry.AvatarRP.info : The prettier looking Avatar poetry subsite. It utilizes a lot of features in MediaWiki throughout the site and also used html to make it look even prettier!
 * Avlis Wiki - avlis.org :Documenting the rules and evolving history of the NWN game persistent world Avlis
 * Award Annals - awardannals.com :Documents and ranks the most-honored creative works in recent history. Literature, film and music are ranked by the award honors they have received.
 * AWUW - wiki.SimPlaza.net : About the 3D chat software "ActiveWorlds"
 * AX25Wiki - www.ax25.org :Information about AMPRNet
 * Axaptapedia - axaptapedia.com :Microsoft Axapta programming tips

B

 * Bahaikipedia - bahaikipedia.org : An encyclopedia for topics relating to the Bahá'í Faith
 * The Baltimore Collective - BaltoCo.org : a community recollection of things uniquely Baltimore. MediaWiki cultural archive project for Baltimore, Maryland US
 * Bartender's Database - bartendersdatabase.com : Wine, beer and spirits
 * Baseball Reference Bullpen:baseball-reference.com/bullpen
 * Battlestar Wiki - battlestarwiki.org :Battlestar Galactica episode and character guides (original and new series).
 * BelegarthWiki - geddon.org :An open source project created, written, & edited for the Belegarth Medieval Combat Society, a full-contact sport where participants engage in combat using foam padded representations of medieval weapons.
 * Berlin by Numbers - www.bbno.info :The free Berlin guide that anyone can edit from a mobile phone
 * Betawiki - translatewiki.net :Free Open Source Software localisation wiki-style
 * Bhamwiki - bhamwiki.com :Documenting the Birmingham District (Alabama, USA)
 * Biblebase.com - wiki.biblebase.com :a one stop Bible resource site.
 * BibleWiki - bible.tmtm.com :an on-going project to build a user-created free scholarly commentary to the entire text of the Christian Bible.
 * Big Wall Climbing Wiki- bigwalls.com/wallwiki :A site where climbers can upload big wall information.
 * biketrip.org - biketrip.org :The long distance bicycle travelers forum.
 * BIONICLEsector01 Wiki - biosector01.com :A wiki dedicated to BIONICLE storyline and set information.
 * BionicTest Wiki - bionictest.no-ip.org/testwiki :A fun test wiki where users can test out sysop and bureaucrat tools, as well as several other things!
 * BioSites - BioSites.org : BioSites.org is an openfree information provider of companies or web sites. You can freely add and edit your site's profile anytime.  BioSites.org will help introduce your websites and provide external links and references that can enhance and increase traffic to your site, and connect you with your visitors.
 * Bishopbriggs Parkour - andrewsmillie.co.uk/spk :Bishopbriggs Parkour is dedicated to Parkour in the Bishopbriggs area of Glasgow, Scotland
 * BitCircle Wiki - bitcircle.com :A wiki dedicated to retro gaming but allows new games as well.
 * BlackshotForce - Blackshot Wiki :A Blackshot wiki that is committed to allowing users to post the latest guides and game information regarding the MMOFPS, Blackshot.
 * Blackshot Wiki - http://blackshotfps.com/wiki :A wiki dedicated to the online FPS Blackshot.
 * Black Vault Encyclopedia Project - :Encyclopedia relating to UFOs, Paranormal, Conspiracy, and Government Cover-Ups
 * Blender foundation - wiki.blender.org :Graphics animation and video production program
 * Bluecortex - www.bluecortex.com : Complex Systems topics
 * BluWiki - BluWiki.com :Free MediaWiki web host
 * BMOSS - www.bmoss.net : Business Membership Organizations Support System. Wiki and blog with focus on non-profit BMOs in developing countries.
 * BOINC Wiki (Unofficial) - boinc-wiki.ath.cx :Distributed scientific research participants and projects using Berkeley Open Infrastructure for Network Computing, BOINC
 * Bob's Variety Site - www.stuermertechnology.com/wiki/index.php : For all your random needs!
 * Bollywood - wiki.bollywood.tv :Sowing the seeds for a comprehensive, accurate and informative encyclopedia on Bollywood and the Indian film industry in general.
 * BonWiki - bonwiki.com :All things Bonaire, Netherlands Antilles
 * Bondpedia - bondpedia.net :Wiki devoted to James Bond
 * Boobpedia - Boobpedia.com :Encyclopedia of women with big boobs. Includes busty celebrities, models, adult performers, and amateurs.
 * The Bookbag - Bookbag.co.uk :Fiction, biography, crime, cookery and children's book reviews.
 * BotanicWiki - Sagescript Institute :Botanical and herbal information especially as it pertains to skin care.
 * Brahma Kumaris Info - BrahmaKumaris.Info :Support forum and encyclopedia documenting life in and after the Brahma Kumaris cult, exposing the teachings and lifestyle.
 * Brewwiki - www.brewwiki.com :How to make your own beer.
 * Brian Maunde-bmaundewiki.co.cc : A resource for web designing and web hosting. Free and paid. Information on Brian Maunde
 * Bromwiki - www.bromwiki.net :Information on the tropical pineapple plant family.
 * Buddhist Encyclopedia - Buddhism.2be.net :Encyclopedia of Buddhism with articles, videos and audios of all Buddhist traditions including the Theravada, Mahayana and Vajrayana.
 * Bulbapedia - bulbapedia.bulbagarden.net : Community-driven Pokémon encyclopedia.
 * BZFlag - my.bzflag.org/w/ :project wiki of BZFlag - a free online multiplayer cross-platform open source 3D tank battle game

C

 * Campingcar-wiki - Knowledge base for motorhomes : A wiki that grew from a self help Yahoo group list about Motorhomes.
 * Car Loan Wiki - CarLoanWiki.com : Everything someone would need to know related to auto loans.
 * Car Loans - Car Loans Online : About Car Loans
 * CPNN Wiki - cpwiki.co.nr : An encyclopedia dedicated to Club Penguin.
 * C# Online.NET - en.csharp-online.net/, de.csharp-online.net/, es.csharp-online.net/ : Wiki-based C# and .NET reference of articles, forums, and tutorials.
 * C&amp;C Modding Encyclopedia - ModEnc.RenegadeProjects.com :A project to provide one central source of modding knowledge for the Command &amp; Conquer series of games
 * CapeInfo.com - CapeInfo :developing a collaborative tourism Vision for Cape Town
 * CarterWars Sexadex - Sexadex :CarterWars Series Information wiki
 * CaseWiki - wiki.case.edu :Case Western Reserve University wiki
 * CastleCopsWiki - wiki.castlecops.com : CastleCops.com computer security assistance forums and wiki information repository.
 * Center for Biomedical Research Informatics - CBRI :Center for Biomedical Research Informatics at the University of Minnesota
 * Center for Biomedical Research Informatics / Software Development - SWDev CBRI :Software Development group of the Center for Biomedical Research Informatics at the University of Minnesota
 * Chainki - www.chainki.org :An open content wiki directory based on Dmoz data.
 * Chains of Reason - chainsofreason.org :Provides a unique way for anyone to follow, and contribute to, arguments for and against particular beliefs.
 * ChaoseedWiki - chaoseed.com :Chaoseed Productions wiki, web-based games and writing projects
 * CharionalWiki - CharionalWiki :Charional(Anıl Özdemir)'s Personal Wiki.
 * CheatCodeWiki - CheatCodeWiki.org : This is a massive wiki dedicated solely to cheat codes.
 * Chemipedia - www.chemipedia.net :Dedicated to free articles and discussions of in-depth chemistry topics for chemistry students and professionals. Also provides chemistry graduates a venue to post their dissertations and theses online.
 * ChesterWiki - Chester Wiki :Community Site for Chester, England
 * ChristianMedia.ca - ChristianMedia.ca : ChristianMedia.ca provides the history since 1867 of Canadian Christians working, volunteering and ministering in media in Canada
 * Cinepedi - www.cinepedi.org : The Movie Encyclopedia
 * CIRLWiki - cirl.missouri.edu :Wiki/Website for the Computational Intelligence Research Lab at the University of Missouri - Columbia
 * CircassianWiki - www.adygaunion.com: Circassian(Adyge) history and culture wiki, by Worldwide Circassian Brotherhood (WCB)
 * CISSA - CISSA.ca :University College of the Fraser Valley's Computer Information Systems Student Association (UCFV CISSA)
 * City University of New York, Doctoral Students' Council - http://cunydsc.org :Website for Doctoral Students' Council for the City University of New York, Graduate Center.
 * ClawsOrPaws Software Wiki - clawsorpaws.com :Software catalogue and userguides - primary focus is on freeware and open source software
 * Claypedia - www.clayaikenwiki.com : Claypedia - The wiki dedicated to Clay Aiken
 * CoastalZone | ZonaCostera | KüstenZone | FrangeCôtière | KustStrook | .Info :Community site with relevant and on-time information, useful for the integrated management of the coastal zones of our world. Integrated development is everybody´s business!
 * Club32Wiki - Club32.org :An obsessive listing of information pertaining to the Disneyland and Walt Disney World Resorts.
 * CoCoWiki - coco25.com :Tandy/TRS-80 Color Computer
 * Code-Compiler - Code-Compiler.com :A cross-compiler and translator for Fortran and Cobol to other languages
 * coDEVwiki - en.coDEVwiki.org :A cooperative software development wikl.
 * Code Snippets Wiki codesnippets.wikia.com :A wiki-compatible syntax code guide, hosted by Wikia
 * Collaborative Landscape - CollaborativeLandscape.org :Site devoted to research, practice and education in landscape architecture, urban design and planning
 * Colorado Hiking Trails - coloradohikingtrails.net :Hiking trail reviews, trailhead directions, topos and articles covering hiking trails in Colorado
 * Combined Community Codec Pack - cccp-project.net :Information and help for video playback in general and CCCP solutions in particular.
 * Comedy Club London - comedy club london :Information about comedy clubs in London
 * CommunityManuals.com - communitymanuals.com/shiii :Community developed manual for Silent Hunter III (submarine simulation game)
 * CommunityPages.org - Community Pages :A community website dedicated to providing a web presence for local events and issues.
 * CommunityTraveler.com - Community Traveler Online Travel Guides :Community-written travel guides licensed under the GFDL.
 * Compare-IT - Compare-IT.org :Buyer's wiki to Information Technology data sheets and comparing IT products
 * Conbledegook - The Conbledegook File :Alex Holden's glossary of Eastercon-related jargon.
 * Consumerium - develop.consumerium.org :Fair trade, political consumerism, and moral purchasing trends
 * ConveyorWiki - ConveyorWiki.com :ConveyorWiki.com is the "Wiki" or "Encyclopedia" for Conveyor, Conveyors and Conveying.
 * Computerpedia -ComputerPedia :Computer encyclopedia as well as a database of spyware and many other things.
 * Cooperative Linux Wiki - wiki.colinux.org/ :Wiki for developers focused on the Cooperative Linux (CoLinux) project
 * CopperWiki - www.CopperWiki.org :LOHAS (life style of health and sustainability) network
 * Cowboy Bebop Space Cowboy - Cowboy Bebop: Space Cowboy: A wiki devoted to the anime Cowboy Bebop, and a MUD based on said Anime.
 * CPPLC Wiki - cpplc-wiki.mine.nu :A collection of tutorials and information relating to the C and C++ programming languages.
 * Crazy Hacks - crazy-hacks.org :Crazy software- and hardware-projects of geeks all around the world
 * CreationWiki - creationwiki.org :Encyclopedia of creation science
 * Creative Commons - wiki.creativecommons.org :Compendium of development information for Creative Commons tools
 * Crossroads MUSH - www.crossroadsmush.com :Setting and theme information for Crossroads MUSH, a text-based roleplaying game
 * Cruising and Sailing Wiki - World Cruising and Sailing Wiki :An online world cruising guide.
 * CryptoDox - cryptodox.com: Encyclopedia on cryptography and information security
 * CS Wiki- cs.calstatela.edu/wiki/ :A wiki used in the Computer Science Department at California State University, Los Angeles.
 * Cumulopedia - clouds.wikia.com/wiki/ :A nephology/meteorology encyclopedia.
 * Cunnan - cunnan.sca.org.au :Information for re-enactors of the Middle Ages and Renaissance
 * CycleChaos- Motorcycle Wiki :Encyclopedia focusing on motorcycles.

D

 * DomainingWiki - DomainingWiki.com :Information about investing in Internet domain names.
 * D&D Wiki - dandwiki.com :A collection of Dungeons and Dragons material both homebrewed and SRD.
 * DamsWiki - damsulegna.net :Documentation and user manual's for the mIRC Client Dams2k4 and IRC game DamsIRPG.
 * Debatepedia - debatepedia.org :The Wikipedia of Debate using logic-tree methodology
 * DebtReduction123 - Student Debt Consolidation : Recources for Student Debt.
 * DCDatabase - dcdatabaseproject.com :DC Comics information and image database
 * Dedupe Project - dedupe.sourceforge.net :Open Source Fuzzy Matching & Deduplication Project
 * DeskTux - desktux.nl :Linux on desktops
 * DharmaFlix - DharmaFlix.com :Buddhist & Spiritual Film Video Wiki
 * Diffen - Diffen.com :An encyclopedia of comparisons and differences.
 * Dirtopia - dirtopia.com :The free off-road encylopedia
 * DishiWiki - DishiWiki.com :Where everyday cooks share recipes and talk about cooking and food
 * Discourse DB - discoursedb.org :a database of political commentary, including print and online sources
 * Discriminating Employer - discriminatingemployer.com :Against discrimination in the workplace
 * Discworld & Pratchett Wiki - wiki.lspace.org :Everything about Terry Pratchett and his Discworld book series
 * Distributed Proofreaders - pgdp.net/wiki : A wiki for documentation and collaborative tasks at Distributed Proofreaders
 * dKosopedia - dkosopedia.com :A political encyclopedia built by the DailyKos community
 * DNSRBL.org - dnsrbl.org :DNS blacklist and spammer fighting information source
 * DOS Games Compatibility Wiki - wiki.classicdosgames.com :Compatibility knowledgebase for running DOS games on modern computers
 * DotA Allstars Wiki - http://www.dota-allstars.com/wiki :A wiki dedicated to act as a guide to the game DotA Allstars
 * Drive the Americas - drivetheamericas.com : A guide for travelers driving in North, Central, and South America
 * DssWiki - www.DssWiki.net :The online Satellite Encyclopedia!
 * Dreamhost - wiki.dreamhost.com :Customer wiki for the webhosting company Dreamhost
 * DueWiki - www.duewiki.com :A wiki dedicated to local and historical resources for Real Estate Due Diligence researchers.
 * Dummipedia - dummipedia.org: A Wikipedia companion, catering to the needs of those of us who have difficulties reading more than 500 words per article, especially online.
 * DunedinShopping.co.nz Wiki - Dunedin Shopping Wiki :A wiki associated with a virtual tour of the main pedestrian shopping district in Dunedin, New Zealand
 * DwarfWiki - http://www.observationdome.org/wiki :A Wiki dedicated to the BBC2 Sci-Fi show, Red Dwarf.
 * Dystopia Wiki - www.dystopia-game.com/wiki :A project dedicated to providing information about the Dystopia modification of Half-Life 2.

E

 * e107 - e107.org :e107 is a content management system written in php and using the popular open source mySQL database system for content storage. It's completely free and totally customizable, and in constant development.
 * e107 mods wiki - digitaerie.com :Enhancing the e107 CMS through modification
 * e-Sifarat.com Freight Pedia www.e-sifarat.com/wiki/ : Freight Forwarding and Logistics Wiki Portal
 * E-studij.si e-študij.si :Slovenian student's notes from faculty's lectures
 * EarthWiki - kayatana.com :Sustainable Development, Conservation and the Environment
 * ECGpedia - ECGpedia.org :ECG (heart tracings) course
 * Eclipsepedia - wiki.eclipse.org :The Eclipse Open Source Project Wiki


 * ECU CS Department - - East Central University Ada, Oklahoma: Computer Science Dept
 * Ekopedia - en.Ekopedia.org: The encyclopedia of ecology. The project is part of http://www.ekopedia.org
 * EggeWiki - theeggeadventure.com/wiki: Brian Egge's coding tips and scrapbook
 * Electoral Reform - ElectoralReform.Wikia.com: Voting Systems and Electoral Reform
 * ElvisPedia - ElvisPedia.org :Elvis Presley Encyclopedia
 * EncyclopediaFantastica - EncyclopediaFantastica :The fantasy encyclopedia - covers any aspect of the fantasy genre.
 * Encyclopedia of Pointless - eopoint.com: An eight-year-old humor website that switched to MediaWiki two years ago.
 * EncycloWine - encyclowine.org :For wine enthusiasts. All aspects of wine are covered, from the types of wine, countries and regions, the winemaking process, wine tasting, terms, culture, and history.
 * Entrada Utah - entradautah.com :Destination travel guide to Utah National Parks and visitor attractions
 * envirowiki - envirowiki.info :environmentalist and activist resource
 * Eshralopedia - Eshraval.com :Encyclopedia for the geofiction online game Eshraval: A Nation of Your Own
 * EveryonesHome - EveryonesHome.org.uk :All about UK Homelessness and how we can end it - contains Campaigns and new informational open-source Directory to change the housing advice industry forever.
 * EvoWiki - cotch.net :Evolution education, biology, and origins. Repository for mainstream scientific responses to common intelligent design and creationism arguments
 * Expertepedia - :Expertepedia is providing all-in-one services including Encyclopedia, video, music etc..
 * ExlomProject - [wiki.exlomproject.com] :Exlom Project is an open source company managed by its community...

F

 * FaithfuturesWiki - faithfutures.org :Historical Jesus research project
 * Falsipedia - falsipedia.com :The sum of human knowledge... give or take - now with humor!
 * Faqs4games - www.faqs4games.com :A wiki primarily for video game cheats and faqs.
 * FAQ Farm - www.faqfarm.com :Questions & answers on any topic
 * FerryPedia - www.ferrypedia.com :A knowledge database on ferries and ferry operators.
 * Fiesta Online Wikia - fiestahq.sparkonline.net :The very first original Fiesta fansite created for the MMORPG, Fiesta Online, providing the latest in Fiesta news and information.
 * Fiesta Wiki - www.fiestafan.com :The ultimate source for information on the MMORPG online game Fiesta.
 * FIX-IT.BOOMSHANKA - www.fix-it.boomshanka.org :A Website which started in late 2008 to share knowledge by tutorials for all subjects.
 * FFXIclopedia - http://wiki.ffxiclopedia.org :THE Source for Final Fantasy XI information.
 * theFireWiki.org - www.theFireWiki.org :An online knowledge base for the fire service.
 * Flashopedia - flashopedia.net :A Wiki about Flash. The flash wiki.
 * FlyerWiki - en.flyerwiki.net :All about flying and travelling
 * Folding@Home - Folding@Home :Folding@Home is a distributed computing project aimed at understanding protein folding, misfolding, and related diseases.
 * Folktunes Archive - folktunes.org :Archive of folk tunes for teaching and learning
 * Forget the Franchise - forgetthefranchise.com :A directory of Independent shops, retailers and businesses
 * FraternityManuals - fraternitymanuals.com :Manuals and resources for all fraternal organizations
 * Free Encyclopedia of Thelema - fet.egnu.org :Informations about the philosopy of Thelema from Ecclesia Gnostica Universalis
 * Free Geek - wiki.freegeek.org :Free Geek, a nonprofit organization which puts unwanted computers back into use to benefit deserving volunteers and nonprofits.
 * FREE HOSPITAL - WWW.FREEHOSPITAL.ORG : YOUR FREE ONLINE HOSPITAL
 * FreeGameDevWiki - wiki.freegamedev.net :Open source game development wiki.
 * Freespire - freespire.org :Wiki for the Linux distribution Freespire.
 * Fringe Wiki - Fringe Wiki :Wiki for the Fox TV Show Fringe.
 * FLindersStudents - : A Student guide to flinders uni

G

 * G37-Tech - G37-Tech.com : An Infiniti G37 Information Site.
 * G503Wiki - wiki.g503.com :Wiki for the worlds #1 WWII jeep and military vehicle internet resource.
 * Gaiapedia - Gaia.Wikia.com : Community dedicated to documenting the largest English speaking forum on the internet. (GaiaOnline)
 * Galbijim Wiki - http://wiki.galbijim.com : Information on South Korea, specifically from the point of view of the expat in the country.
 * Game Innovation Database - www.gameinnovation.org : Documents the history of videogame innovation.
 * Game Programming Wiki - gpwiki.org : game programming tutorials and source code for a variety of languages and platforms.
 * GameWinners - GameWinners.com : Uneditable cheat code website.
 * Gammu+, Gammu, MyGnokii - www.gammu.org :Free tools and software for cellular devices and phones
 * ganfyd - ganfyd.org : Resource for medical professionals
 * Garry's Mod Wiki - wiki.garrysmod.com : Wiki about Garry's Mod - FPS Source game
 * Geeklog Wiki - wiki.geeklog.net :For the open source CMS / weblog
 * GenieWiki - :For the three games using the genie engine - Age of Empires, Age of Kings and Star Wars: Galactic Battlegrounds
 * Gentoo-Wiki - gentoo-wiki.com : Gentoo linux community
 * GingerWiki - GingerWiki.com : Local services such as plumbers or dentist with tables of prices.
 * GISWiki - en.giswiki.org :Geographic information system, news, meetings and information
 * Glen Cook Wiki - www.glencook.org : Author Glen Cook Reference Site
 * Globulation2 - globulation2.org :The game Glob2
 * GLOKAL-Marketing - www.glokal-marketing.eu : A wiki forum for marketing people
 * Global Web Security Systems Support Wiki - wiki.gwebs.com : Both a support wiki for Global Web Security Systems' MailCloak software, and an educational wiki about encryption.
 * GoSustainable Documentation Repository - doc.gosustainable.org : A documentation wiki for the GoSustainable organization.
 * Greekopedia - www.Greekopedia.com :A wiki about college fraternities and sororities.
 * GridPP - wiki.gridpp.ac.uk :GridPP, UK Computing Grid for Particle Physics.
 * GROMACS - wiki.gromacs.org : for the molecular dynamics simulation software GROMACS.
 * Grumbling Dwarf - www.GrumblingDwarf.com : Community table-top game site for southcentral Wisconsin region.
 * GTI - community.gti.se : Community for students and their teatchers in a small university in Sweden.
 * GTR-Tech - GTR-Tech.com : A Nissan GT-R Information Site.
 * Guild Wars Wiki - wiki.guildwars.com :The official Guild Wars Wiki, information on all aspects of the MMO, Guild Wars.
 * GuildWiki - GuildWiki.org : a wiki guide for ArenaNet's Competitive Online RPG, Guild Wars.
 * Guitar(Wiki) - Wiki Guitar : Community based on teaching Guitar to others. Good stuff.
 * Gungfu Dojo - Gungfu WikiDojo Listings :The Online Resource of Martial Arts Schools, Training Centers, and Dojos throughout the world and the USA.
 * Gurudwara Shri Paonta Sahib - http://www.gurudwarasrishergahsahib.org : We are working on Implementing this site in Wiki, Will be live Soon.......
 * GuruQuiz Wiki - GuruQuiz.com :A wiki for free online quiz questions in all areas for education, training or fun. Users can create there own quiz and share it.
 * GuyanaWiki - GuyanaWiki.org :Guyana is an english speaking country in South America with information and photos on its wildlife, environment... A free CD project based on it is given out to schools and libraries.
 * GWwiki - hackwurld.com/gwwiki : A collaberative effort to flesh out the official setting for the HackMaster role-playing game, Garweeze Wurld.

H

 * Halo Mod Maps Wiki - Halomodmapswiki.tk :Wiki for Halo Mod Maps.
 * Hardware Book - www.hardwarebook.info :Cable and connector pinouts along with technical specs of computers and consoles.
 * Hardware-wiki - Hardware-wiki :Articles of common computer hardware components focused partly on Linux users
 * Hardwood Investments Wiki - wiki.hardwood-investments.net :A wiki about investing in teak plantations and other hardwood/forestry investments
 * Hattrick Wiki - wiki.hattrick.org :Encyclopedia concerning the online football manager game www.hattrick.org
 * Hay Interiors - hayinteriors.com.au:Comprehensive soft furnishing business
 * Health Knowledge Base - HealthKB.org :Health Knowledge Base about Mind, Body, and Environment.
 * Help For Shepherds - helpforshepherds.org :A site to help supply resources for Christian pastors.
 * HexWiki - hexwiki.org :General information about the board game of Hex. Includes many strategy topics.
 * Hifi-Wiki.com - www.hifi-wiki.com: A free database for all kinds of hifi products
 * High School Alumni - www.hsalum.com :For graduates of United States-based high schools to keep up with one another
 * Hitchwiki - hitchwiki.org :Information about hitchhiking.
 * Holoprosencephaly.net - www.holoprosencephaly.net : Offers information about holoprosencephaly and the care of a child with HPE
 * HomeInspectionWiki - HomeInspectionWiki :Resources for home inspectors and inspections, including industry terms, photos of terms, standards of practice, etc.
 * Homestar Runner Wiki - hrwiki.org :Knowledge-base about the cartoon series Homestar Runner
 * HondaWiki - hondawiki.com :A wiki dedicated to owners of Honda's
 * HookahWiki - www.hookahwiki.com :Knowledge-base for Hookah and Shisha related information.
 * Horological Wiki - clockmakers.archivist.info :Encyclopedia of all thats horological
 * HostelManagement.com - Hostel Management Wiki :Community-written documentation and resources on how to start and manage backpacker hostels.
 * HostPedia Wiki - HostPedia Wiki: Knowledge-base about web hosts and servers. This Community based wiki site contains information, guides and documentation about web hosting.
 * How Happy - HowHappy.org :Provides a forum where users can voice how happy they are with nearly anything.
 * How Shall We Then Live? - HowShallWeThenLive.com :Knowedge base and information site regarding the question of life, death, how to live, how one should live, observations on life, the living, ways to live, why we should live or die and all the interesting questions we have while alive about life itself.
 * howtopedia.org - http://www.howtopedia.org :(en,fr,es) Howtopedia is a library for practical knowledge and simple technologies. It focuses on development tools.
 * Hurghada-Apartment.com - www.hurghada-apartment.com :A site for accomodation near Hurghada on the Red Sea Riviera.
 * hymnswithoutwords.com - : (en) Hymnswithoutwords is a resource of downloadable recordings of hymns and carols that are suitable for use in services.

I

 * IDN wiki - ICANN TLD I18N :Eleven internationalized test TLD s
 * Ifigenia - Ifigenia.org : Wiki for collaborative scientific research, development of educational content and partners networking in the areas of intuitionistic fuzzy sets and generalized nets
 * iFilmConnection.com - iFilmConnection.com :Independent film maker's resource center. Information on film making, guerrilla film tactics, how to's, directing, producing, lighting, financing, and more.
 * Illapedia - illarion.org :Illapedia is your source for information about the free MMORPG Illarion
 * Illogicopedia - illogicopedia.org :A wiki for random humour, Illogicopedia is a wiki mostly dedicated to non-, semi- or entirely humorous surrealism (which might variously be considered clever, dumb, silly, or just plain nonsensical) and some satire.
 * ILoveDrink.com - ilovedrink.com :Pub and club reviews and alcohol information!
 * iMarketingGuru.com - iMarketingGuru.com :The SEO/SEM 3.0 Wiki illustrating all tactics of site and link building as well as traffic generation.
 * Indianetzone - Indianetzone.com :Information on India on various topics
 * Industrial Design Wiki - industrialdesignwiki.com :An Industrial Design resource listing links and descriptions for those links to useful resources for Industrial Designers.
 * infoAnarchy Wiki - infoanarchy.org :Information related to file sharing, copyright, the gift economy, cyber liberties, peer to peer research, information tools, and similar topics
 * InfoEng.SourceForge.net - infoeng.sourceforge.net : Open source software to create digital financial instruments with digital information as the underlying asset.
 * Intellipedia - : Classified U.S. government intelligence gathering wiki
 * International Music Score Library Project - www.imslp.org :A virtual library containing public domain musical scores, as well as scores from composers who are willing to share their music without charge.
 * Interuniversal - editthis.info/Interuniversal :A wiki for the science fiction project Doom Crisis.
 * Invader Zim Wiki - the-mu.net or themu.5gigs.com/wiki :A compendium of Invader Zim knowledge, transcripts, and fan things.
 * Invertebrate Wiki - :Catalogue and Discussion of Invertebrates in Nature & Care in Captivity.
 * IpbWiki - www.ipbwiki.com :Integration of Invision Power Board with Mediawiki.
 * iPodLinux - ipodlinux.org :The main documentation and development information resource for the iPodLinux project.
 * ieXbeta Wiki - iexbeta.com :ieXbeta's wiki is about operating systems and software applications.
 * iamdogWiki - iamdogWiki :iamdogWiki is to be a collaborative effort to develop a true political party platform for "normal" people, not the fringes in both directions.
 * isaacpedia.com - isaacpedia.com :Isaac's Wiki. Genereal information about interesting topics.
 * ISBTwiki - webapptst.lasalle.edu/wiki :Wiki for the Integrated Science, Business and Technology (ISBT) Program at La Salle University in Philadelphia, PA  USA.
 * IslandWiki - IslandWiki.com :Caribben island information by travelers, for travelers.
 * ITwiki - stevens.edu/itwiki :The Stevens Institute of Technology's Information Technology documentation website.

J

 * Jajuk - jajuk.info : Jajuk is software that organizes and plays music. It is a fully-featured application geared towards advanced
 * Janapar - Janapar :Janapar is the trail leading trekkers and hikers through Karabakh. users with large or scattered music collections.
 * JavaScript Wiki - javascript.wikia.com :sufficiently interoperable ECMAScript
 * Jgene Wiki - jgene.org/wiki:Jewish Genealogy Site
 * Jignasa - jignasa.net :Site for Sharing knowledge
 * JimTrade - JimTrade.com :Website for Indian Products
 * Jmol - Jmol wiki :Jmol is a Java molecular viewer for three-dimensional chemical structures.
 * Jnana Base - jnanabase.org :General wiki knowledge base
 * Joegle - joegle.com/w :Personal wiki of various things
 * Jokeist - jokeist.com :Jokes website Jokeist.com, a non-profit Jokes Wiki
 * JournoLeaf - JournoLeaf.org : Journal publishing site
 * JorjaWiki - wiki.jorjafox.net :Site for the actor, Jorja Fox
 * Jumba Support Wiki - wiki.jumba.com.au :Customer support for hosting, broadband and other Jumba Interactive services maintained by Jumba customers

K

 * K12wiki - myshortpencil.com :Pre-K-12 U.S. public school project
 * K12LTSP - K12ltsp.org : A software distribution packaging Fedora and CentOS Linux with the Linux Terminal Server Project (LTSP) software, tailored for use in schools
 * Katrina Help - KatrinaHelp.info :Community assistance for victims of hurricanes Katrina and Rita
 * kekePower - wiki.kekepower.com : kekePowers Information By-Way
 * Kerneltroubleshootomatic - kerneltroubleshootomatic.co.nr :Computer knowledge base with wiki and forum.
 * KisikewNews - KisikewNews :Indigenous News wiki
 * Kjikaqawej Wiki - Kjikaqawej Wiki :Indigenous and Computer Knowledgebase
 * KneeQuickie - wiki.penguindeskjob.com:Conlanging, ZBB-community
 * Know Home Schooling - knowhomeschooling.com : Home Schooling Guide
 * Knoxville Tennessee Wiki - knoxvilletennesseewiki.com : Life, Business and Organizations in Knoxville, Tennessee
 * KoL Wiki - kol.coldfront.net : Information and spoilers for Kingdom of Loathing, a web-based MMORPG
 * kpopwiki - kpopmusic.co.uk :Asian music
 * Krass - krass.com :Techno in Barcelona, Germany and London.
 * Kunkelfruit Wiki - Kunkefruit Wiki : The web home for collaborative articles about how popular products are made.
 * KUpedia - WiKUpedia (soon to be KUpedia.org) : A wiki run by students at the University of Kansas
 * K-Wiki - K-Wiki : Project management tools

L

 * LabVIEW Wiki - wiki.lavag.org :Dedicated to the LabVIEW programming language.
 * Law4u- www.law4u.net :All about Law
 * LegacyView- www.LegacyView.com :LegacyView Dictionary of World Biography
 * Lehigh Engineering Heritage Initiative - www.lehigh.edu/heritage :Database of biographies of successful members of the Lehigh University engineering community
 * Libra - webbed.org/libra :A collaborative novel
 * Libregamewiki - libregamewiki.org :Free as in freedom video gaming
 * LifeWiki - conwaylife.com/wiki :A collection of patterns and information about Conway's Game of Life
 * Lilisto's Wiki - wiki.lilisto.com :Lilisto personal bookmark manager's help section
 * LimeWire - wiki.limewire.org :LimeWire's website and wiki
 * Lingua Veritas Lingua Veritas - Translation interpretation :A Wiki-based multilingual resources agency
 * Line Zone - line-zone.com/wiki :Wiki for the young linerider fansite-forum
 * Linuxconfig.org - linuxconfig.org :The the free Linux knowledge wikiportal
 * Linux Questions - linuxquestions.org :A General Linux Self-service Technical Support Forum
 * Link Building Wiki - Link Building Wiki :Link Building and Link Popularity
 * LinksCiti - LinksCiti.com :A wiki link directory separated into thousands of topics.
 * Little Rock Renaissance - http://honors.uca.edu/wiki :All things Central Arkansas
 * LogMeIn Wiki - LogMeIn Wiki :Wiki with articles about LogMeIn software.
 * Lost Souls - lostsouls.org :A MUD with a wiki for its players and developers.
 * Lostpedia - lostpedia.com :A fan-maintained guide to the TV show LOST.
 * LOTRO Wiki - lotro-wiki.com : A Lord of the Rings Online fan-site.
 * LoveToKnow - lovetoknow.com :A wealth of information on various topics - every field has its own wikipage
 * LURKMORE - lurkmore.com :database for chanchan and 4chan and all imageboard/internet related information
 * LyricWiki - LyricWiki.org :Over 200,000 songs w/no annoying banners or pop-ups.
 * Lyriki - The Lyrics Wiki - lyriki.com :Lyrics site

M

 * MCommerceWiki - MCommerceWiki.com :List of M-Commerce solutions, service providers and common practices.
 * Macedonia Wiki - Macedonia Encyclopedia :Mediawiki powered Macedonia Wiki, with a beautiful skin!
 * MapleStory - BrandonFrohs.com :Wiki to help players of the MMORPG MapleStory.
 * Super Mario Wiki - Mariowiki.com :A wiki about Nintendo's Super Mario series.
 * MartialArtsWiki – www.Martial-Arts-Wiki.info :Encyclopedia about martial arts
 * MuslimWiki (Mw) MuslimWiki.com :The open encyclopedia on Islamic Subjects and the Muslim world from the Muslim perspective.
 * Magic Sanctum - Magical Wiki encyclopedia project :Devoted to the complete indexing and central archive of magic, magicians, illusions, and everything magical arts related!
 * Mahalo - Mahalo.com : Search Engine
 * Malawi360 - Malawi360.com :Living, working and tourism in Malawi
 * Mandriva Community Wiki - mandriva.vmlinuz.ca :A community website for Mandriva Linux users
 * Mankatopedia - mankatopedia.com :Wiki about the city of Mankato, Minnesota, USA.
 * MansonWiki - MansonWiki.com :A wiki devoted to industrial rocker Marilyn Manson and his eponymous band.
 * Marlinpedia - Marlinpedia.com :Devoted to the Florida Marlins
 * MarvelDatabase - marveldatabase.com :Marvel Comics information and image database
 * Martial Arts - Martial Arts Wiki - WikiMartialArts.org: Online information and resource for Martial Arts, Karate, Kungfu, Mixed Martial Arts, Wrestling, Jui-Jitsu, Grappling, Judo, Weaponry, History of Martial Arts, Traditonal Shaolin, General Instruction, Dojo School Listings and much more.
 * MasonWiki - MasonWiki.net :For students, by students, a wiki for all things George Mason University-related
 * Mathematical Trading and Finance - Mathematical Trading and Finance :Based around the MSc course available at Cass Business School, London
 * Mediawiki Users Group - www.mediawikiusers.com : For MediaWiki users, administrators and developers, a resource to enhance the content of MediaWiki.org. Provides a forum for help with a specific topic, generalized FAQs and HowTos, and more.
 * MeetYourAncestry - MeetYourAncestry : For family historians to preserve oral histories, share information, photos and documents, and discover the individuals behind their family trees.
 * MeritBadge.org - www.meritbadge.org : Helping Scouts Advance - Information and resources for the Boy Scouts of America - includes Cub Scouting, Boy Scouting, Varsity Scouting, Venturing, and Sea Scouting.
 * MetaBase - BioDatabase.Org : MetaBase is a user contributed database of databases, listing all the biological databases currently available on the internet!
 * MetallicaWiki - MetallicaWiki.com : A wiki about heavy metal band Metallica.
 * MFBWiki - mfbwiki.org :Recording the history of Melbourne's Metropolitan Fire Brigade
 * MiamiHeatwave.com Wiki - MiamiHeatwave.com Wiki :Miami Heat fan site dedicated to archiving Heat lore for posterity!
 * MicraWiki - wiki.micra.org.uk :A place where people can come and post their progress and news on all things Micra.
 * Micros Systems - wiki.micros.com/wiki: Official documentation for their latest products. (Site is restricted via logging in to their website.) They also use MediaWiki for internal documentation and employee collaboration.
 * Middleton-StJohns - Middleton-StJohns :Genealogy and literary site makes extensive use of DPL and interwiki links
 * MidnightWiki - midnightwiki.com :Open information repository for indiscriminant intellectualism
 * Million Artists (Translations) - wiki.millionartists.com :Translations for Million Artists - abstract art fundraising project
 * Macalester Public Knowledge Base - mpkb.net : A Public Knowledge Base for organized activism, led by Macalester students in Minnesota.
 * MixesDB - MixesDB.com :Database for DJ Sets and tracklists.
 * MMOnlineWiki - MMOnlineWiki.com :Wiki containing information about MMORPGs.
 * ModEnc - ModEnc.RenegadeProjects.com :An Wiki collecting all modding information regarding Command&Conquer series.
 * Moodle Documentation - Moodle Docs : Documentation for Moodle, an open source educational course management system.
 * Motorsports Wiki - WikiMotorsports.org :The definitive online guide to all things motorsports, powersports, auto, motorcycles, motocross, supercross, speed racing & anything with an engine.
 * Mozilla Wiki - wiki.mozilla.org :Plans of software development of the Mozilla Foundation
 * Mozilla Developer Center - developer.mozilla.org : Mozilla Developer documentation.
 * Mozillazine Knowledge Base - kb.mozillazine.org :Semi-official knowledge base about Mozilla products.
 * Mono Project - www.mono-project.com : Cross platform and open source implementation of Microsoft .NET framework
 * MTG Archive - mtgarchive.net : A library of information related to the Magic: The Gathering collectible card game
 * Music-Web Music Encyclopedia - A growing Music Encyclopedia created by musicians
 * Mustangpeak Wiki Help - wiki.mustangpeak.net : Help for Mustangpeak.net software and components
 * MolecularWiki - Molecular Biology and Science Wiki
 * MusicDocz - MusicDocz.com/wiki : Very Useful for Musicians and Music Lovers. Song Information including many lists of complete recordings by various Artists.
 * myElectrical - myelectrical.com : Electrical Engineering Wiki!
 * MyErasmus - MyErasmus.org : Obtain information and share knowledge with other Universities, students or teachers about the Erasmus Programme
 * MyraPedia - MyraPedia.eu : Create fantasy detail with art and stories in one of the oldest SharedWorld projects around the world Myra.
 * Mystiki - Mystiki :A resource on western and eastern mysticism and mystical societies.

N

 * NSDL - wiki.nsdl.org : National Science Digital Library
 * NativeWiki - www.nativewiki.org :Native and Indigenous Peoples Wiki
 * Narciki - wiki.neely-chaulk.com :Naval Architecture wiki
 * NeoNoodles - www.neonoodles.com :Parenting advice and information
 * NetPedia - Netmunity.com :The great free encyclopedia of Netmunity - The Great Internet Community
 * NetworkDictionary - wiki.networkdictionary.com :Information sharing on the IT, Networking, Telecom and Computer fields
 * Network for the Study of Archaic and Classical Greek Song www.let.ru.nl/greeksong : International network devoted to the study of lyric, elegiac and iambic poetry in archaic and classical Greece
 * Neverwinter - nwn.wikia.com :A Wikia that documents Neverwinter Nights.
 * New Start Ministries Church Wiki - newstartministries.org :An effort by New Start Ministries Church in San Francisco to allow collaboration when developing every Sunday service
 * New York City Electronic Music Collective - nycemc.ajbnet.com :A site devoted to the re-connection of the New York electronic music scene.
 * Nexopedia - wiki.nexoscms.org :A wiki dedicated to the NexOS CMS
 * NikkiWiki - nikkiwiki.com :Online Pornstar Encyclopedia
 * Nintendo-Scene - wiki.nintendo-scene.com :A collection of tutorials guides and information on the hacking and modification of Nintendo consoles.
 * NinWiki - ninwiki.com :Wiki for the band Nine Inch Nails
 * NSwiki - ns.goobergunch.net :A Wikipedia-style encyclopedia for the online game NationStates
 * Novell Developer Wiki - developer.novell.com/wiki/ :Novell developer wiki
 * NursingWiki - NursingWiki.org :knowledge-database for nursing and health care information
 * NetNovinar - wiki.netnovinar.net :Edithorial Ethics for online journalists Wiki.
 * Neptune Pink Floyd Neptune Pink Floyd - :A collective encyclopedia for the band Pink Floyd
 * Node, The The Node - :A collective database for the fictional sci-fi universe of 'Transit'.
 * NY Canals NY Canals.com - :Information and cruising guide to the New York State Erie, Oswego, Champlain and Cayuga-Seneca Canals.

O

 * Oberwiki - oberwiki.net :Wiki for anything and anyone related to Oberlin College and the town of Oberlin, Ohio.
 * Objectivism Wiki - wiki.ojectivismonline.net :A wiki for Ayn Rand's philosophy of Objectivism
 * Ocean Wiki - www.oceanru.com/wiki :Wiki for anything and anyone related to Hidden Knowlege.
 * Octopus Wiki - tddft.org :Software for the quantum simulation of the excited dynamics of molecules.
 * Ogre3D - http://www.ogre3d.org/wiki/ :Free open source 3D graphics engine library.
 * Old-Computer Wiki - :Wiki about old computers and stuff (we haved moved to a new host!)
 * Onekopakaspace Wiki - onekopakaspace.strangled.net/~onekopaka/mwtrunk/ :A Wiki made for fun & collaboration.
 * Online Marketing Wiki - www.onlinemarketingwiki.com/wiki/ :A Wiki about online marketing
 * ooBdoo - :Center for popular information of all kinds.
 * OOModels - oomodels.org :an open library of modelling artefacts from the business and technical domain
 * Open Babel - openbabel.sourceforge.net :Open source chemistry library
 * Open Clip Art Library Wiki - http://www.openclipart.org/wiki :Wiki for the Open Clip Art Library Project
 * Openbox - openbox.org :Openbox window manager
 * OpenDarwin - opendarwin.org :Open source Darwin project
 * OpenID.net - openid.net wiki :OpenID development and status
 * OpenGameForge.org - http://www.opengameforge.org/components/com_mambowiki/ :Free open source game and mod development community.
 * Open Game Wiki - http://www.opengamewiki.com/index.php?title=OpenGameWiki : Open Game Wiki for maintaining an encyclopedia on all available games.
 * OpenGovProject.org - http://opengovproject.org/index.php/Open_Government_Project OpenGovProject :Collaborate with us in providing information about the politicians that hold office, their various positions, the functions of their office, and how to make a difference.
 * OpenMW - openmw.sourceforge.net/wiki :OpenMW is an open source reimplementation of the game Morrowind.
 * OpenSearch - opensearch.org :A9 open search standard development
 * OpenTTD - wiki.openttd.org :Game manual and development resource
 * OpenTutorial - www.OpenTutorial.com :Tutorials About Everything by Anyone
 * OpenVZ - wiki.openvz.org :Documentation for OpenVZ - Operating system-level server virtualization, free software built on Linux
 * OpenWetWare - openwetware.org : an effort to promote the sharing of information, know-how, and wisdom among researchers and groups who are working in biology & biological engineering.
 * Organic Design Wiki - organicdesign.co.nz :Exploring OO, P2P & XML within the Wiki environment
 * OrbLyrics - orblyrics.com :An English wiki of Japanese artists' and bands' lyrics in Romaji and English translations.
 * OrthodoxWiki - orthodoxwiki.org : An open-content encylopedia of Orthodox Christianity
 * OSDevices - osdevices.org :Because devices deserve open source
 * OverclockingWiki - OverclockingWiki.org :Overclocking information plus the software to overclock and run on your overclocked system.
 * OZONE Wiki - ozone.game-host.org :Wiki about the 3D-Oxyd called OZONE

P

 * PA clinical wiki - http://pawiki.webhop.biz:For physician assistant students on clinical rotations
 * Pale Ravens - http://wiki.paleravens.com:An all-era Vampire storyworld and play-by-wiki freeform RP (hosted by MysteryAndMagic.com).
 * Pan Greece - Greece Wiki:A Wiki all about Greece


 * Patriotic Citizens Of America Wiki - mycountryiwantitback.com/wiki :Political Wiki
 * PepperWiki - pepperwiki.chuma.org:A place to collect and share information about the Pepper Pad, a tablet-like device running Linux from Pepper Computer, Inc.
 * Pershing - http://wiki.pershingmissile.org :Preserve, interpret and encourage interest in the history of the Pershing nuclear missile systems
 * PESWiki - peswiki.com/ :The community-built resource that focuses on alternative, clean, practical, renewable energy solutions.
 * Ph.D. Prep Track - phdprep.byu.edu :Provides information on earning an Accounting Ph.D.
 * Photowiki - www.photowiki.org :photo wiki?


 * PilotGigs - pilotgigs.info/pgwiki :Database about pilot gig racing


 * PinataIsland.info - http://PinataIsland.info :Dedicated to the Viva Piñata Xbox 360 game and television series
 * Pirates@Home - http://pirates.spy-hill.net
 * BOINC test stand, and demonstration of BOINCAuthPlugin.php, which provides automagical authentication to the wiki based on prior authentication to the BOINC project


 * Planet Sims wiki.planetsims.co.uk :A wiki about The Sims and The Sims 2
 * Plants.am - http://www.plants.am :is an encyclopedia of plants and garden information in wiki format
 * PlasticsWiki - Plastics Wiki :The wiki about plastics & polymers
 * PLAWiki - PLA Wiki :Satire wiki about open source, established by PLA - Penguin Liberation Army
 * PlentyWiki - thePlenty.net : A wiki about the Realm of the Elderlings and other works by Robin Hobb/Megan Lindholm
 * Point Omega Research - wiki.omega-research.org :A wiki about the coming Point Omega transition
 * PonyWiki - www.PonyWiki.com :A wiki for My Little Pony collectors
 * PoultryHub - www.poultryhub.com :Allows people involved or interested in poultry production to access and share a wide range of poultry related information, with a primary focus on commercial poultry production.
 * Public Policy Wiki - bPolicy.org :For public development of public policy. A wiki  for submitting policy proposals and branching off existing public policy documents.
 * Posterism - posterism.com :A wiki about vintage posters, their artists and galleries
 * PoxWiki - PoxWiki.com :A fan-managed Wiki for everything related to the PoxNora Online CCG


 * PresidencyWatch - presidencywatch.com :Contains information about the US presidential election.
 * Programmers' Society - progsoc.org :A society at University of Technology, Sydney
 * Project Powder Wiki - www.projectpowderpro.com :A wiki for the game Project Powder.
 * ProjectWiki - www.ProjectWiki.net :A wiki for Project Management resources.
 * Proteopedia - Proteopedia.Org : A collaborative, 3D encyclopedia of proteins and other molecules with >50,000 pages using the Jmol extension (java applet showing rotating molecules) and a molecular Scene Authoring Tool.
 * PSConclave - www.psconclave.com :A wiki dedicated to the art of Pen Spinning!
 * PsychWiki - www.psychwiki.com :Creating a collaborative resource and compendium of practical knowledge about psychological research.
 * PutterPedia - www.putterpedia.com :The most complete listing of data related to Putters and putting.
 * Pynchon Wiki - www.pynchonwiki.com :Explores all the novels of Thomas Pynchon - 6 wikis.
 * Pyrowiki - www.pyrowiki.com :How to make fireworks, flash powder, black powder, rockets, aerial shells and more...

Q

 * - Qualitionary - Qualitionnaire : The purpose of Qualitionary is to create an English language glossary of terms used in the implementation of Integrated Management Systems covering:
 * the environment
 * the quality of the products and services
 * the health and safety of all stakeholders.
 * The project is not intended to duplicate existing dictionaries or to compete with any existing online reference, such as Wikipedia, but rather to augment them with definitions derived from laws, directives, regulations, and standards. Qualitionary is its French language counterpart


 * Quadratus.ws - Quadratus.ws :Personal site.
 * QuakeWarsWiki.net - QuakeWarsWiki : Enemy Territory: Quake Wars community wiki.
 * Quantiki - Quantiki.org: Quantiki is the free-content WWW resource in quantum information science.
 * Qwiki - Qwiki.stanford.edu: Qwiki is a quantum physics wiki devoted to the collective creation of technical content for practicing scientists.

R

 * Radiology Wiki - RadiologyWiki.org :A reference for medical imaging
 * Radiology Imaging - Radiology :Fastest growing online portals for radiologists and related medical imaging professionals
 * Radswiki - radswiki.net :A radiology wiki
 * RaveWiki - ravewiki.com :A site hosting software projects (like the Rave Framework), documentations and articles
 * Razor Wiki- wiki.razorirc.info :A site for development and documentation for an IRC client, server and in-house protocol.
 * ReactOS Wiki - www.reactos.org/wiki :Wiki relating to the development and documentation of the ReactOS Operating System
 * RealCTY - RealCTY.org :About CTY, the Center for Talented Youth, especially its summer program.
 * Reformed Word - ReformedWord :The Bible (in Greek and Hebrew), Doctrine and History from a Reformed (Calvinist), Christian perspective, emphasis on linguistics
 * ResearchID.org - ResearchID.org :Researching all issues related to intelligent design.


 * RLDSWiki - Wikia :A Restoration Branches knowledge base, written from a RLDS Point of View.
 * Rocna Anchors Knowledge Base - www.rocna.com/kb :Comprehensive collection of resources relating to boat anchors, anchoring, and accessories.
 * RTAW Reefpedia - RTAW Reefpedia :Reefing the Australian Way Reefpedia, providing and information resource on the keeping of a marine aquarium for Australian hobbyists.
 * RuneScape Wiki - RuneScape Wiki :A large database containing information on the game RuneScape, hosted by Wikia.
 * RxWiki - RxWiki.com : An online medication encyclopedia for consumers, written and edited by pharmacists.

S

 * S1mp3 project - wiki.s1mp3.org :Information related to the S1 Mp3 Player
 * SacWiki - SacWiki.com : The definitive guide to all things related to Sacramento California.
 * sasCommunity.org - sasCommunity.org : The place for all users of SAS software to gather to share information.
 * Saltspring Ecovillage Education & Development Society (SEEDS) - IslandSeeds.org :Development of an ecovillage on Salt Spring Island, BC, Canada
 * Santa Cruz.com - Santa Cruz.com : Santa Cruz, California news, events, and tourism information
 * SCI Team Wiki- www.sciteam.ubc.ca :A peer program group from the University of British Columbia
 * Scion Tech- www.scion-tech.org :A site for the Toyota Scion line of cars: tC, xA, xB, xD.
 * Scout It Out - scoutitout.org :A wiki designed to provide information on great Boy Scout activities that are available for Boy Scouts in their area.
 * ScoutWiki - en.scoutwiki.org :Free scouting encyclopedia in English.
 * Scramble- scramble.nl :All about aviation.
 * ScriptsPedia- Scripts Repository :A Wiki dedicated to open source code examples in various programming languages.
 * Seattle Wiki - seattlewiki.org :The city of Seattle and surrounding area
 * Second Life - wiki.secondlife.com: official Second Life's Wiki
 * Second Life History Wiki - history.secondserver.net: Historical record for the 3D, online, chat-build, multi-user environment Second Life.
 * ServerWiki - www.serverwiki.org :For Game Server Administrators, covers setup and installation of all different kinds of Game Servers on various Operating Systems.
 * SFWiki - http://sfwiki.org : Information for locals and travelers to the SF Bay area.
 * Shadowrun : Awakened Wiki - awakenedmmo.org :Open-Source Shadowrun MMORPG
 * Shartak Wiki - http://www.shartak.com : Web-based MMPORPG, set on a mysterious island where natives and outsiders hunt and explore.
 * ShetlandDictionary.com - ShetlandDictionary.com : The Online Shetland Dictionary. Over 700 Shetland words that can be searched by Shetland to English or English to Shetland
 * Shetlopedia.com - Shetlopedia.com : The Shetland Encyclopedia. For all things Shetland related.
 * Showiki - Showiki.com : Hollywood information for the current day artists.
 * ShropshireWiki - ShropshireWiki.com : A collaborative site dedicated to the county of Shropshire, England.
 * Sightseeing Wiki - granmundo.org : A travel portal dedicated to sightseeing and related activities around the globe.
 * Sikhi Wiki - sikhiwiki.org :Encyclomedia of the Sikhs
 * SilkRoad Online Wiki - silkroad.skenmy.com :Online MMORPG SilkRoad Online
 * Simulism - simulism.org :Wiki about Simulism
 * SiteRewriter Wiki - siterewriter.com :Site Help for all web sites
 * SkepticWiki - :Site the Encyclopedia of Science and Critical Thinking
 * SklogWiki - www.sklogwiki.org :-a physics wiki for the thermodynamics, statistical mechanics, and computer simulation of materials, community.
 * SKYbrary - www.skybrary.aero : The single point of reference in aviation safety knowledge.
 * Slabscapedia - Slabscape.com : The future's out there.
 * Slowtwiki - http://www.slowtwitch.com/wiki :Wiki dedicated to endurance sports.
 * SmallBusiness.com - http://smallbusiness.com :Wiki resource for owners and managers of small businesses.
 * SmartLogic Solutions - smartlogicsolutions.com :SmartLogic Solutions is a software development and consulting firm. SLS specializes in creating data-driven web applications.
 * Snickipedia: The Lemony Snicket Wikipedia - : This is Wikipedia, but it has been Snickified- a word which here means "remodeled to only have stuff to do with Lemony Snicket".
 * Social Media Wiki - wiki.awakenedvoice.com : Documenting the world of social media.
 * Social Science Summary Database - adambrown.info/p/summaries :Collects summaries of scholarly books and articles, especially those relevant to political science.
 * Sonic Retro - http://info.sonicretro.org/ :Encyclopedia of Sonic The Hedgehog-related media.
 * SonikWiki - sonikmatter.com/wiki :Living documentation for the Sonikmatter Communities, including Kurzweil Synthesizers and Logic Audio.
 * Sons of the Thames - www.sonsrowing.org.uk :Sons of the Thames Rowing Club, Hammersmith.
 * Source Watch - sourcewatch.org :Directory of the people, organizations and issues shaping the public agenda. Focus on propaganda (formerly "Disinfopedia")
 * South Dublin Astronomical Society - southdublinastronomy.org :Amateur observational astronomy resource
 * SpamWiki - spamtrackers.eu : This wiki, maintained by spamtracker.eu contributors, is devoted to understanding spam and how you can personally take action to create a spam-free world.
 * Spadout - Rock Climbing Gear :Spadout provides information about gear and techniques used in outdoor sports including rock climbing, backpacking and caving.
 * SpongePedia - Home - SpongePedia " An extremely popular SpongeBob wiki with over 700 full Quality artices, with lots of fun. be sure to join! also in german
 * SpongyWiki - SpongyWiki.com :It's a wikipedia for SpongeBob - but a lot crazier. We have events, games, prizes, and much more coming soon. Please join and become part of the revolution!
 * SporeWiki - sporewiki.com : SporeWiki is the knowledge base dedicated to Spore - the computer simulation video game developed by Wright Will Wright
 * Sportiki - sportiki.com :A live, user-created site covering the world of sports.
 * SpottersWiki - SpottersWiki.com :Guide to airport spotting and photography locations
 * Square Mile Wiki - inthesquaremile.com :Information about the City of London
 * SDSC SRB Wiki - sdsc.edu/srb :Information about the San Diego Supercomputer Center's Storage Resource Broker (data grid software)
 * Star Trek Games Wiki - stgu.com/startrekgames/ :Star Trek Games Information
 * Star Trek Online Wiki - stowiki.com :Star Trek Online MMOG Wiki (en, fr, de)
 * Stars!wiki - wiki.gible.net :For all things related to the PC game Stars!
 * Stellarium Wiki – stellarium.org :Stellarium is a free planetarium for your computer
 * Stereoshift Wiki – wiki.stereoshift.net :Collaborative wiki for providing documentation for plugins to Stereoshift
 * StOgame Wiki - stogame.net/wiki :Standard Ogame Project Wiki - tools and scripts for Ogame.
 * Stoopid Wiki - stoopidwiki.com :A fun source for all things "stoopid"
 * Storiki - storiki.com :Collaborative writing site that utilizes wikis for creative ventures.
 * StrategyWiki - StrategyWiki.org :Collaborative source for copyleft video game FAQs, walkthroughs, and strategy guides.
 * Stunts Wiki - stunts.mine.nu/wiki :Information, resources, history and whatever else related to the classic racing game Stunts (aka 4D Driving).
 * Sublime Portal, The - | sublimeportal.com :Expats forum and information about Turkey.
 * Sunnyday - Sunnyday :Psycology, traingings, selfimproovement (Russian).
 * SupaWiki - :News from the Men's Rights Movement.
 * Supernatural World - :Supernatural wiki.
 * SUWiki - suwiki.org :The Sketchup Wiki.
 * Sweetnam.eu - sweetnam.eu :Personal website of a I.T. Technical nature.
 * SymbianWiki - SymbianWiki.com :An editable guide telling you All About Symbian.

T

 * TagLoops - www.tagloops.com: Help, application info and community around TagLoops, the web application for creating Web Movies
 * Table Tennis Philippines - tatapx.org :Table Tennis Association of the Philipines Extension
 * Talk Nightlife Wiki - wiki.talknightlife.com : The memory bank for the Talk Nightlife forum.
 * Teaching resource Wiki -  : Teaching resources for Key Stage 1 & 2
 * Technical Analysis - Technical-Analysis.EU : Encyclopedia for Technical Analysis (Financial).
 * Technical Christmas - www.TechnicalChristmas.com : Technical Advanced Christmas Decorating
 * Technical Presentations - TechPresentations.org :Collection of conferences and presentations on various technical topics
 * TechWikiToday - TechTalkToday.co.nr :A technology article database for the TechTalkToday forums.
 * TechWriterWiki - TechWriterWiki.com :A practical on-line reference for professional Technical Writers/Communicators.
 * TelemarkWiki - Telemark Wiki : Telemark Skiing.
 * TeleWiki - Secure.BusinessPhonesDirect.com/wiki/ :Articles on business telecommunications including hardware, programming, compatibility, installation, companies.
 * TESLibrary - www.teslibrary.com : A wiki site dedicated to all things Elder Scrolls, the Bethesda Softworks series of games (Arena, Daggerfall, Battlespire, Redguard, Morrowind, Bloodmoon, Tribunal, Oblivion, Knights of the Nine, Shivering Isles, etc.)
 * Test Wiki - testwiki.unixpod.com : A wiki for the testing of sysop, bureaucrat, oversight, and checkuser (limited) rights. Runs off the trunk version of mediawiki (updated daily).
 * TFWiki - TFWiki.net : Knowledge database dedicated to the various Transformers characters, episodes, comics, and toylines.
 * The ABC DollWiki - The ABC DollWiki : A wiki on things related to dolls focusing on fashion dolls such as Barbie® dolls and Fashion Royalty®.
 * The Chemistry Book - The Chemistry Book: An online chemistry textbook.
 * The Five Pillars Wiki- The Five Pillars Wiki : A wiki about the online multiplayer game The Five Pillars.
 * The Funny Wiki - The Funny Wiki : A wiki that you can put anything you want on, a kid work and school safe uncyclopedia.
 * The Ginever Block - TGBwiki : The TGBwiki is the development wiki for Pokémon Crimson.
 * The Infosphere - futurama.overt-ops.com/ :A wiki for all Futurama related info.
 * The Kim Stanley Robinson Encyclopedia - The Kim Stanley Robinson Encyclopedia :A New project documenting the works of author Kim Stanley Robinson.
 * The Pico - ( ThePico dot com¸au ) :Home site for Paramotor, Hangmotor, and other Picolight enthusiasts in Australia
 * The Programmers Wiki - theprogrammerswiki.org :Any general topic concerning computer programming.
 * The Wiki Fire - The Wiki Fire : The unofficial, free encyclopedia of Knox College in Galesburg, IL
 * Theatre Support Systems Wiki - TheatereSupportSystems : A web site devoted to providing technical support documentation for Center Stage Softwares Wintix and Tixsale Box-office Ticketing system.
 * ThetisWiki - ThetisWiki : An parody planet with humurous articles
 * The Trail Wiki - TheTrailWiki.org :A Compilation of Maps and Experience documenting a multitude of Trails and Backpacking routes around the world.
 * The Ultimate Comment - TheUltimateComment.com :Postmodern investigation of the Secret of the Universe
 * ThinkNOLA Wiki thinknola.com :Wiki guide to life in New Orleans, post-Katrina
 * ThinkWiki - thinkwiki.org :Linux distributions on IBM/Lenovo ThinkPads
 * This Might Be A Wiki - tmbw.net :Wiki for all things They Might Be Giants
 * Thistlepedia - wiki.thethistle.org :Thistle yearbook's wiki
 * TinyMCE step by step - rorlach.de :Documentation and examples for the TinyMCE webeditor
 * TipCollection - tipcollection.com :Tips, tutorials and how-to guides to help make life easier.
 * Tolkien Gateway - tolkiengateway.net :Currently the largest encyclopedia about J.R.R. Tolkien and his works.
 * Total Commander Wiki - www.ghisler.ch/wiki :Knowledge base for Total Commander, famous file manager software for Windows
 * Total Malware Info - totalmalwareinfo.com :Malware descriptions: viruses, trojans, worms, backdoors, and spam; removal instructions; papers on computer security; provided by Design and Test Lab
 * Tracklists.org - tracklists.org :User contributed DJ Set Tracklistings
 * Track2Asia - www.track2asia.com :Travel guide for Asia allowing travelers to share their experiences, upload photos, and provide other travelers with insight information about destinations in Asia.
 * Trunkmonkey Racing - www.trunkmonkeyracing.com/wiki:Trunkmonkey Racing's race team operations and logistics guide
 * TSR Wiki - thestudentroom.co.uk :The Student Room, Information for students
 * Tubeopedia - Tubeopedia.com :Everything you ever wanted to know about vacuum tubes, the equipment and circuits that use them and theory about them.
 * Tulipedia - tulipedia.org :Encyclopedia on Calvinism
 * The TV IV - tviv.org :An online compendium of television knowledge
 * The Star Wars Podcasting Guide - TSWPG :A wiki to help podcasters or prospective podcasters.
 * Thilopedia - :A wiki made by fans of Thilo Savage, who was deleted from wikipedia due to a grave miscalculation.
 * Things You Should Know About - Tyska.net :Tyska is collaborative writing project focused on providing our readers only the most important and actionable information on any given topic.
 * T-Vox - t-vox.org :Information, advice and support group from transgendered, intersexed and genderqueer people.

U

 * UgandaWiki - ugandawiki.ug :The Uganda online encyclopedia.
 * ukcider - ukcider.co.uk/wiki :Real cider and perry
 * UK Citizens' Online Democracy - www.ukcod.org.uk : Website for the charity UK Citizens Online Democracy.
 * ukdiy - wiki.diyfaq.org.uk :Frequently Asked Questions for the uk.diy Newsgroup
 * UKGameshows - ukgameshows.com :Information on British television and radio game shows and people associated with them
 * UMassWiki - umasswiki.com :Wiki for the University of Massachusetts Amherst community
 * Uncyclopedia - uncyclopedia.org :Satirical parody of Wikipedia
 * United Federation of Trek Encyclopedia - fedtrek.com/wiki :A sci-fi/fantasy wiki
 * United Nations Development Programme (UNDP) - WaterWiki: On-line knowledge map and collaboration tool for the UNDP-Water-Community of Practitioners in Europe & CIS
 * Unofficial Elder Scrolls Pages (UESP) - uesp.net :The wiki about the Elder Scrolls series of games.
 * Unofficial TransGaming Wiki - cedegawiki.sweetleafstudios.com : A collection of information about using Cedega, which allows many Windows games to be played on Linux. Consists mainly of a database of games that have been tested on Cedega.
 * Unmaintained Free Software - unmaintained-free-software.org :Unmaintained/orphaned Free Software projects which are in need of a new maintainer
 * UOGuide - UOGuide.com :An encyclopedia on the MMORPG Ultima Online
 * Ubuntu Document Storage Facility -UDSF :A documentation Wiki for Ubuntu Linux
 * UnburdenUs Medical Side Effects Wiki - :A portal which allows patients to describe Medication Side Effects in a way that makes sense to them.
 * Urban Dead Wiki - http://www.urbandead.com : A Massively Multi-Player Web-Based Zombie Apocalypse. MMPORPG.
 * USEC Force wiki - http://codethirteen.com/usec/ : A knowledgebase for the Worlds leading Virtual Military
 * USEC Force wiki mirror- USECFORCE : A knowledgebase for the Worlds leading Virtual Military
 * Utah Dogs Wiki - http://www.utahdogs.com/wiki/ :Information for Dogs and their people in Utah.
 * uCoz Wiki - http://www.uwiki.org.ua/ :Online Manual for uCoz - Free Hosted CMS.

V

 * ValueWiki - ValueWiki.com: Comprehensive listing of all investments on US exchanges
 * Valve Developer Community - developer.valvesoftware.com :Information about Valve's SDK and Tools
 * Vanipedia - Vanipedia:is a dynamic, interactive encyclopedia of all the teachings of Śrīla Prabhupāda - The founder Acharya of the Hare Krishna movement who taught the science of devotional service rendered to God.
 * Variable Star One-shot Project - : Astronomical Database of Spectra of Variable Stars.
 * Venture the Void Online Documentation - venturethevoid.com :Online documentation for space exploration MMORPG
 * Vicksburg Fire Department - vicksburgfd.com :A wiki for the use of and about the Vicksburg Fire Department in Vicksburg, MS.
 * Vicloronomicon - wiki.arcandio.com :A growing wiki of role-playing game material
 * Videoville - videoville.org :A wiki for cool music videos.
 * The Vim wiki - vim.wikia.com :A wiki dedicated to the cross-platform Vim editor
 * Vindemi - Vindemi.com :A wiki dedicated to Antiques and Vintage Items.
 * Visual KoL - thekolwiki.net :Information about the online role-playing game, Kingdom of Loathing.
 * The Free Voyeurweb's Wiki System - Voyeurweb's Wiki :It is a richly pictured and fully searchable interactive knowledge base base done by the Voyeurweb community for the Voyeurweb community. This Wiki system grows every hour as more and information, text and pictures are added by people like me and you.
 * vtiger CRM - vtiger Wiki :Documentation project for the vtiger CRM business users and developers.

W

 * Wacapedia - :Created by The Wacabian Society, as a guide to all things gentlemanly.
 * WC3Wiki: Warcraft III Azeroth Clan. Clan Owns Wiki page used to network between clans, plan and arrange tournaments, and to download maps and software.
 * Watch Wiki - watch-wiki.net :Web encyclopaedia about high-class mechanical wristwatches
 * WaterWiki: UNDP's on-line knowledge map and collaboration tool for Water-Practitioners in Europe & CIS (United Nations Development Programme)
 * Wayne State University's 1020 Wiki: Wiki for first year writing courses at Wayne State University
 * Wazaabi - wazaabi.org : Website of the Wazaabi toolkit, an accelerator for the development of rich client applications based upon Eclipse RCP, XUL and J2EE.
 * WebKit - opendarwin.org :Wiki for the WebKit project, used extensively in Safari and Mac OS X
 * WeRelate - werelate.org : The world's largest genealogy wiki
 * Wesnoth - wesnoth.org :Website and wiki for the Battle for Wesnoth project, a free turn-based strategy game
 * Whackpedia - whackpedia.com :A content and discussion forum for vertical integration of worldwide discussions and more
 * What The Hack - whatthehack.org :The outdoor hacker conference/event in the Netherlands 2005
 * Who Is Everyone? - whoiseveryone.com :A website which contains biographical articles about real people
 * WiFi Wiki AiRdump - AirDump.Cz Wiki: Wardriving, Wireless, WEP, Hardware Hacking Document System
 * WikiGlobalMart - WikiGlobalMart.org :Open and free global marketing place for any organization, product and service from any part of the world.
 * Wikiasiantravel - Wikiasiantravel.org :Your ultimate guide to travel to Asia, with sights to see, accommodation details, places to dine, shopping spree locations, news, Great Deals and more!
 * Wikevent - wikevent.org :worldwide, Free calendar of public events (like concerts, lectures, parties, classes, sporting events, ...)
 * Wiki24 - 24.wikia.com :Everything there is to know about the hit television series 24
 * Wikia : A network of MediaWiki sites on many topics
 * WikiAbout - WikiAbout.com : "Knowledge Base without a Tie" ... that anyone can edit. Share your Expertise with the World ... in a Casual Way.(Beta version - Help Wanted). Complementary to a Wiki[encyclo]pedia, this project aims to become the repository for common human knowledge and expression of their perception of the World. It is based on the belief that it is the worthiest thing in the universe - As much diversity and as little control as possible sought :)
 * WikiAV - WikiAV.com : An online Audio and Video guide
 * WikiBlog Consulting - wikiblogconsulting.com :a free, collaborative resource for professionals
 * wikiblue - dyo-ecksdee.com/blue/wiki :A wiki for an IRC channel
 * Wikibon - Wikibon.org :Best practices in storage, IT and business written by a community of practitioners, consultants and market researchers.
 * WikiCells - wikicells.com :A wiki all about cell phones!
 * WIKICHAT - www.wikichat.org : Developing chat-related extensions for the wiki community.
 * WikiCheats - : A wiki-based game walkthrough site run by GameTrailers
 * Wiki Classical Dictionary - www.ancientlibrary.com/wcd/ : A wiki devoted to the history, literature, mythology, art and archaeology of the ancient world.
 * Wikicompany - Wikicompany.org : A free, worldwide, business directory.
 * WikiCrimeLine - WikiCrimeLine.co.uk :Resource on English criminal law
 * Wikidesktop - wikidesktop.org :Desktop Engineer Guide for desktop engineers, technicans, admistrators and deployment engineers. For software deployment and imaging on Microsoft Windows.
 * WikiDance - WikiDance.org : A directory of dance related groups. Bands, teachers and Clubs.
 * WikiDevices - wikidevices.org :Objective information on consumer electronics, hacks, tests, performance, usability.
 * WikiForGood - wikiforgood.org :Guide to social and environmental progress
 * WikiEd - WikiEd.co.uk :A Wiki for student and teachers alike to create SQA corce notes.
 * wikiEODia - wikiEODia.co.uk : A Wiki for sharing information about online gaming, particularly vanguard, everquest and wow, but any information welcome!
 * WIKI-EUROPA - Tribune of European civil society :Knowledge base about European democracy, governement, humain rights, civil society, solidarity ( G / F / E)
 * WikiFamilyFun Family Fun Activity Guide : A family activity guide created and edited by families.
 * WikiFAQ - wikifaq.com :Informative FAQs on all imaginable topics
 * WikiFilmSchool - wikifilmschool.com :A wiki designed to inform and instruct on all aspects of filmmaking and the processes involved with it - from high budget studio pictures to no-budget do it yourself guerilla filmmaking.
 * Wikigate - maximumtailgating.com/wiki :source of tailgating information for sports fans in the United States
 * Wikigogy - wikigogy.org :to write TEFL TESL TESOL English teaching lesson materials and ideas
 * Wiki-Gore-Pedia (Wikipedia Goregrind) - www.goregrind.com/wiki : a complete encyclopedia of goregrind music
 * WikiGreen - WikiGreen.com :A Wiki for all things Golf that anyone can edit.
 * Wikigrounds - wikigrounds.org : A wiki about the popular entertainment website Newgrounds.
 * WikiHealth - wikihealth.com :Health & Wellness topics
 * WikiHelp - en.wikihelp.cc :A help documents site
 * wikiHow - wikihow.com :A How-To Manual
 * wikIran - wikIran.org :Open content English-language encyclopedia project of the Iranian-speaking peoples
 * WikiJava - WikiJava.net :The Wiki about Java, on WikiJava you can find all the code samples and tutorials about the most powerful programming language in the world.
 * WikiKnitting - wikiknitting.com :A knitting How-To and collection of free patterns
 * WikiKnowledge - wikiknowledge.net/wiki:The free information database that anyone can edit.
 * WikiLemon - ld.fubaria.org/wiki :A Lemon Demon community wiki
 * WikiLiveWeb - WikiLiveWeb.org : WikilLiveWeb is a website directory powered by people. Let's take the traditional web directory to the next level.
 * Wikilivres - wikilivres.info : Multilingual wiki (now English, French, Russian...). Use the Lilypond extension for sheet music. Free documents. Hosted in Canada.
 * WikiLou - www.wikilou.com :A collaborative wiki about St. Louis, Missouri and the surrounding area.
 * Wikimbad - wikimbad.org :A wiki for sharing reduced and published astronomical data.
 * WikiMedStudent - wikimedstudent.com :A wiki for students of Medicine and the Health Sciences
 * Wikimmigrant - Wikimmigrant.org : A free, worldwide project for aggregating information about immigration laws and rules.
 * WikiMusician - wikimusician.org :A musician's multimdia wiki for playing, recording and performing music. Learn from peers. Show and tell what you know.
 * WikiNoah - www.WikiNoah.org :Welcome, newcomers to WikiNoah. Everything worthwhile to know about the Bnei Noach movement. The Online Encyclopedia about the Noahide movement created by observant Noahides and Jews.
 * WikiNotes - wikinotes.hosted.hostmax.co.uk :UK A-Level notes collaboration project
 * Wikiot - wikiot.com :Music wiki for guitar, piano, drums, etc. Includes lessons, projects, tabs, etc.
 * WikiOutdoors - WikiOutdoors.com :A wiki devoted to helping people get outdoors. Includes articles, gear reviews and program reviews for activities like hiking, mountain biking and skiing.
 * Wikipages- wikipages.com :Business directory for NYC and other cities.
 * WikiPasy - en.wikipasy.pl :Encyclopedia about oldest polish football club - KS Cracovia.
 * WikiPathways - WikiPathways.org :Biological pathways curated by the scientific community.
 * Wikipedia- Wikipedia.org :Free-content encyclopedia
 * Wikipubs - wikipubs.org :Community for sharing information on Pubs, Bars and Clubs.
 * Wikireason - wikireason.net : A debating community that emphasizes the logical structure of arguments.
 * WikiRevs - wikirevs.com : A catalog of product and service reviews (help wanted).
 * WikiRun - wikirun.com :A running encyclopedia.
 * Wiki-Scene - wiki-scene.com :A collection of tutorials guides and information on video game console hacking and modification.
 * WikiScope - wikiscope.org : WikiScope is a freely available portal for microscopy, spectroscopy and bioimaging.
 * Wikiscuba - wikiscuba.com : Scuba diving encyclopedia and dive site list.
 * Wikisocion - wikisocion.org : Encyclopedia of socionics
 * WikiSound - WikiSound : A Site for indexing music
 * WikiSpecs - WikiSpecs : A collection of product information and specifications
 * WikiStock - WikiStock : A reference for Stock Traders
 * WikiStory- WikiStory.com :WikiStory.com allows you to write a short story together with other authors or to write one alone but share it with and receive feedback from thousands of others. (You can write a short story, poem, novel, plot, character description, or any other form of writing.)
 * WikiSummary - WikiSummary : Summaries of Academic Books and Articles
 * Wikithesia - wikithesia.com :Anaesthesia reference site to provide a forum for up to date information in anaesthesia.
 * WikiVerde - WikiGreen.com :A Wiki about sustainability and Green Living.
 * WikiVis - wikivis.org :Information Visualization Wiki site
 * WikiWebComic - wikiwebcomic.penguindeskjob.com :A community-produced webcomic.
 * WikiWit - WikiWit.com :WikiWit is a portal dedicated to community edited fictional stories, movie scripts, and any other open source collaborative, creative writing content.
 * WikiWrestling - wikiwrestling.com :WikiWrestling is your definative source of wrestling information.
 * Wikiyobica - byob.hurfdurf.com :A Wiki for the board BYOB on the forums for SomethingAwful.com
 * WikiYoga - wikiyoga.org :Wikiyoga is dedicated to all forms of yoga
 * Wild-Mountain Wiki - wiki.wild-mountain.net :Share your mountain excursion routes
 * WinMerge Wiki - wiki.winmerge.org :A wiki for WinMerge development
 * Wiredtape - www.wiredtape.com :A wiki designed to help people with red tape and bureaucracy.
 * Wireless Africa - wirelessafrica.meraka.org.za :Home of the CSIR, Wireless Africa, Community Owned Information Network.
 * Wookieepedia - starwars.wikia.com
 * Wiki about Star Wars run by Wikia


 * WordPress Codex - codex.wordpress.org :Online Manual for WordPress
 * World Of Sports Wiki - World Of Sports Wiki :The wiki for World Of Sports ( http://worldofsports.smfforfree3.com/ ).
 * World Wide Wiki - bmearns.net:8080 :Personal wiki with wide range of articles; electronics, computers, physics, math, religion, society, art, and music. Many articles are "how-to"s and similar information pieces.
 * World Wind Wiki - worldwindcentral.com :Knowledge base about NASA's World Wind
 * WowAce - www.WowAce.com:A community built around a addon development framework for the World of Warcraft, by Blizzard Entertainment.
 * WoWWiki - wowwiki.com :The game World of Warcraft, by Blizzard Entertainment.
 * WPIwiki - wiki.wpiirc.net :Unofficial Wiki of Worcester Polytechnic Institute
 * WW II Dodge Wiki - ww2dodge.com :Wiki about Dodge military trucks used in World War II
 * Wiki-site - wiki-site.com:Wiki-Site.com allows you to open and manage a free wiki site

X

 * Xbox 360 Gaming - Xbox360Gaming :An archive for everything Xbox 360.
 * Xbox Media Center Online Manual - xbmc.xbox-scene.com/wiki :The online manual for Xbox Media Center, the free open source (GPL) multimedia-player for the Xbox™ from Microsoft.
 * XFamily - Children of God - xFamily.org :a collaboratively edited encyclopedia about The Family/Children of God cult.
 * XeNTaXWiki - wiki.xentax.com :The world's largest repository of Game Resource Archive Format (GRAF) information. Expanding to non-GRAF formats as well.
 * XC CoasterWiki - wiki.xtremecoastin.com :The largest resource of Roller Coaster and Amusement Industry information.
 * XMLTV GUI Wiki - birtles.org.uk :Documentation for the XMLTV GUI grabber
 * XMSWiki - xmswiki.com :Help and documentation for XMS software (GMS, SMS and WMS).
 * Xooguru - xooguru.com :Articles, reviews, advice and resources on shopping.
 * The XR Wiki - xrwiki.com :A source for information on Honda XR Motorcycles and other motorcycling related topics.

Y
Association.
 * YaBB Codex yabbsupport.com :Online manual for the Perl based open-source project, Yet Another Bulletin Board.
 * Yetzirah yetzirah.sunandshadows.com :Community-created science-fiction universes, PC gaming.
 * YoMo :Young Modellers in Ecology. Scientific network, knowledge exchange.
 * Young Bromley Guide :Information about the London Borough Of Bromley, aimed at young people and teenagers that live in the area.
 * Youpedia - youpedia.org :Your free encyclopedia.
 * YourWiki - YourWiki :A free wiki host.
 * Youth Rights Network - youthrights.net :A discussion of youth rights, led by the National Youth Rights
 * Yo-Yo Wiki - yoyowiki.org :Information about the toys called Yo-yo

Z

 * Zelda Wiki.org - Zelda Wiki.org :A group effort of several fan sites to cover the games of The Legend of Zelda series.
 * ZendExt - ZendExt.maaksite.nl :Extension for the Zend Framework.
 * Zulunotes - Zulunotes.com :Leving Cert (Irish High School exam) study notes collection

MediaWiki-ready hosts

 * 1) Vistapages
 * 2) Hostingplex
 * 3) BlueHost
 * 4) HostMonster
 * 5) Midphase
 * 6) IXWebHosting