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.'' You might also be interested in the List of Open MediaWiki Sites by Andrew Palo and in http://wikiindex.org/Category:MediaWiki.


 * 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: 2016-04-27
 * (Section-specific checks noted in some cases)

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.

#

 * 26Blue - 26Blue.com :Kitchen Remedies, Home Cures, Natural Cures, Granny Remedies, Folk Medicines, Elixirs, Tonics, Foods that Heal
 * 43FoldersWiki - wiki.43folders.com :Productivity and time management practices, "life hacks and other smart heuristics", and more!
 * 3D Game Comparison - www.tnlc.com :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.
 * 866 Area Codes - 866areacodes.com :Reverse lookup for 1-866 phone numbers, suspicious telephone numbers and nuisance callers.
 * 877 Area Code - 877areacode.com :Toll Free 1-877 phone numbers reverse lookup, lookups of unknown telephone numbers including collection agencies and telemarketers.
 * 888 Area Code - 888areacode.com :Reverse lookup 1-888 numbers, list of suspicious telephone numbers including collection agencies and telemarketers.

A

 * AAISP — wiki.aa.org.uk: Wiki for the ISP Andrews & Arnold Ltd.
 * Access Information - ai.net.nz/wiki: A wiki on how to manage Linux.
 * AdCiv.org - AdCiv.org : Advanced Civilization and post-scarcity enabled by open-source design and engineering
 * AQWorlds Wiki - aqworldswiki.com :The original wiki for Artix Entertainment's Flash Based MMO - AdventureQuest Worlds.
 * AIDS Wiki - AIDS Wiki :AIDS dissident website
 * Alfresco - Alfresco.org :Document Management System
 * All The Tropes - allthetropes.org :Uncensored fork of the PmWiki based TV Tropes wiki.
 * Alt-StarFleet-RPG Bureau of Information - boi.alt-starfleet-rpg.net :Star Trek-based shared fiction writing club wiki
 * Amateur Radio Wiki - ham.cx: An on-line encyclopaedia of ham radio, established 2008 in Australia.
 * Amazon Sellers' University - Amazon Sellers' University: A complete repository of everything to do with selling on Amazon.
 * Apple Computer Wiki- applecomputer.x10host.com :A wiki dedicated entirely to anything about Apple Inc.
 * Apple 2 Games - apple2games.com :Apple2Games is a wiki dedicated to games on the Apple ][ line of computers.
 * Appropedia - appropedia.org :Library of appropriate technology, with textbook style topics and how-to style projects.
 * AQ3D Wiki - AQ3dwiki.com :The original wiki for Artix Entertainment's Flash Based MMO - AdventureQuest 3D: Legend of Lore.
 * ArchivesWiki archiveswiki.historians.org : A directory of archival institutions around the world.
 * Archlinux - wiki.archlinux.org :Linux wiki
 * Argumentrix - Argumentrix.com: A wiki of opnions, arguments and rebuttals
 * Armadeus - Armadeus.org : Open & embedded Linux systems development
 * Armeniapedia - armeniapedia.org : Information about Armenia
 * ASCEND - ascend4.org : A free mathematical modelling program for science and engineering.
 * AsianWiki - asianwiki.com :Database of Asian films, television shows, performers, and filmmakers.
 * AskDrWiki - askdrwiki.com :A Medical Wiki for practicing physicians, residents, and medical students.
 * Assela Pathirana - assela.pathirana.net : Random Ravings

B

 * Bahaikipedia - bahaikipedia.org :An encyclopedia for topics relating to the Bahá'í Faith
 * Baseball Reference Bullpen baseball-reference.com/bullpen
 * Battlestar Wiki - battlestarwiki.org :Battlestar Galactica episode and character guides (original and new series).
 * Beachapedia - beachapedia.org :A resource of coastal knowledge, issues and articles from the Surfrider Foundation- including the State of the Beach report covering all 26 US coastal states, Puerto Rico, and British Columbia.
 * 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.
 * BetaWiki - betawiki.net :A open wiki which contains information about beta operating systems and software.
 * Believe The Sign - believethesign.com :Independent, objective information on William Branham's life and ministry, the beliefs of his followers, and the criticisms of his detractors.
 * Bhamwiki - bhamwiki.com :Documenting the Birmingham District (Alabama, USA)
 * Biblebase.com - wiki.biblebase.com :A one stop Bible resource site.
 * Binary Options Wiki - binaryoptionwiki.com :Binary Options Wiki - Binary Options Trading Pedia
 * Bittylicious - bittylicious.com :Bitcoin buying help and support subsite
 * Biodiversity of India - Biodiversity of India :Aimed at increasing awareness about the biodiversity of India and encouraging community participation in its conservation.
 * BIONICLEsector01 Wiki - biosector01.com :A wiki dedicated to BIONICLE storyline and set information.
 * Bitcoin Wiki - bitcoin.it
 * blackwiki! - dank.qemfd.net :Programming, UNIX, and the ramblings of Nick Black
 * Blender foundation - wiki.blender.org :Graphics animation and video production program
 * Blok City - www.blokcity.com :Information on all the Mega Bloks sets released
 * BluWiki - BluWiki.com :Free MediaWiki web host
 * The BLWiki - www.bluelight.ru :A harm reduction wiki aimed at safer drug use.
 * Bogleheads wiki - https://www.bogleheads.org/wiki/Main_Page :reference resource for investors
 * Boobpedia - Boobpedia.com :Encyclopedia of women with big boobs. Includes busty celebrities, models, adult performers, and amateurs.
 * Border Regiment Wiki - border-regiment-forum.com/wiki: A wiki about the British Regiment between the years 1881-1959.
 * The Bookbag - Bookbag.co.uk :Fiction, biography, crime, cookery and children's book reviews.
 * Brewwiki - www.brewwiki.com :How to make your own beer.
 * Brickimedia Meta - meta.brickimedia.org :The central coordination site for the Brickimedia network.
 * Brickipedia - en.brickimedia.org :The largest online encyclopedia about all things LEGO.
 * Bulbapedia - bulbapedia.bulbagarden.net :Community-driven Pokémon encyclopedia.
 * Bulbanews - bulbanews.bulbagarden.net :Your community Pokémon newspaper.
 * Bulbagarden Archives - archives.bulbagarden.net :Bulbagarden's image repository.


 * BZFlag - my.bzflag.org/w/ :project wiki of BZFlag - a free online multiplayer cross-platform open source 3D tank battle game
 * BukkitWiki - wiki.bukkit.org/Main_Page :This Wiki is home to Bukkit's documentation and regulations surrounding the Bukkit Project and it's services. Want to help out? We would love to have you! Signup to get started!

C

 * Cabal Online - cabalwiki.com:Comprehensive game information
 * Camera-wiki - camera-wiki.org : A non-commercial encyclopedia of cameras and photography, successor to Camerapedia.org
 * CEOpedia | Management online - ceopedia.org :Online encyclopedia for managers
 * CGS Publishing Technologies Int'l - http://support.cgsusa.com/wiki :A a collaborative effort to spread knowledge of color management and process improvement using ORIS Color Tuner//Web, ORIS Press Matcher//Web and ORIS Certified//Web.
 * Children's Books Wiki - Children's Books Wiki : A Wiki dedicated to children's books.
 * China Law Wiki - chinalawwiki.com : An international knowledgebase covering the practical legal issues relevant to doing business in and with the People's Republic of China (PRC).
 * Chinese Grammar Wiki - resources.allsetlearning.com : Chinese grammar resource
 * Cinoku - en.cinoku.com :Film lexicon
 * Citizendium - en.citizendium.org :The Citizens' Compendium
 * Clicklaw Wiki - wiki.clicklaw.bc.ca : A wiki of legal information aimed at the public in British Columbia, Canada. Featuring Clicklaw wikibooks, powered by the wikibook extension. Operated by Courthouse Libraries BC.
 * Clinfowiki - www.clinfowiki.org : The Clinical Informatics Wiki - Topics in clinical informatics.
 * 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!
 * Code Snippets Wiki codesnippets.wikia.com :A wiki-compatible syntax code guide, hosted by Wikia
 * Combine OverWiki - combineoverwiki.net :A wiki covering the Half-Life and Portal game series
 * Combined Community Codec Pack - cccp-project.net :Information and help for video playback in general and CCCP solutions in particular.
 * Conservapedia - Conservapedia :A conservative Christian Wiki encyclopedia.
 * Consumerium - develop.consumerium.org :Fair trade, political consumerism, and moral purchasing trends
 * Cookopedia - en.cookopedia.org/wiki/index.php/Main_Page :The best place about cooking.
 * Corkipedia - corkipedia.com :News and History for Cork City and County
 * 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
 * CyanogenMod Wiki - wiki.cyanogenmod.com :A wiki for the CyanogenMod Community project.
 * CycleChaos- Motorcycle Wiki :Encyclopedia focusing on motorcycles.
 * CyPhyNets - cyphynets.lums.edu.pk :The website of the Laboratory for Cyber Physical Networks and Systems (CyPhyNets), at the School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan.

D

 * D&D Wiki - dandwiki.com :A collection of Dungeons and Dragons material both homebrewed and SRD.
 * Daria Wiki - dariawiki.org :Information about the MTV series and its fandom.
 * DayZ Wiki - dayzwiki.com :Tips, guides, and information for DayZ, a zombie survival mod for the game ArmA II.
 * Deskthority wiki - deskthority.net/wiki/Main_Page : This wiki is dedicated to mechanical keyboards, mice and other human interface devices.
 * Detective Conan Wiki - detectiveconanworld.com/wiki/ :The ultimate resource about Detective Conan.
 * Diatessaron wiki - Diatessaron.ir : A wiki about Diatessaron Gospel and anything related.
 * Dirtopia - dirtopia.com :The free off-road encylopedia
 * Discourse DB - discoursedb.org :a database of political commentary, including print and online sources
 * 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
 * Dolibarr - Dolibarr ERP & CRM wiki :All users and developers documentation of Dolibarr OpenSource project.
 * DominionStrategy Wiki - Main Page : A site about the strategy of the game Dominion.
 * DoomWiki.org - doomwiki.org :The Doom video game series.
 * DragonFable Wiki - dfwiki.com :A wiki for Artix Entertainment's Flash Based Web RPG - DragonFable.
 * Dreamhost - wiki.dreamhost.com :Customer wiki for the webhosting company Dreamhost
 * DrinkiWiki - drinkiwiki.com :Large collection of drinking games.
 * Drunken Peasants Wiki - drunken-peasants-wiki.com :The Official Pancyclopedia for The Drunken Peasants Podcast
 * Dungeons and Dragons Wiki - http://www.dnd-wiki.org : A project dedicated to providing reference and fan-made material for the Dungeons and Dragons roleplaying game.
 * Dystopia Wiki - www.dystopia-game.com/wiki :A project dedicated to providing information about the Dystopia modification of Half-Life 2.

E

 * ECGpedia - ECGpedia.org :ECG (heart tracings) course
 * Eclipsepedia - wiki.eclipse.org :The Eclipse Open Source Project Wiki
 * EcoliWiki - ecoliwiki.net :Resource for the Model Organism Escherichia coli
 * ECO Issues - ecoissues.ca :Database of reports by the Environmental Commissioner of Ontario (ECO).
 * Edutech Wiki http://edutechwiki.unige.ch/: Educational technology, hosted at TECFA, University of Geneva.
 * EggeWiki - theeggeadventure.com/wiki: Brian Egge's coding tips and scrapbook
 * Egres Open - cs.elte.hu/egres/open :Collection of open problems in combinatorial optimization, maintained by the Egerváry Research Group.
 * Electoral Reform - ElectoralReform.Wikia.com: Voting Systems and Electoral Reform
 * Embedded Linux - elinux.org: Embedded Linux Developers and Users wiki.
 * Embryology - https://embryology.med.unsw.edu.au: Education and research wiki for embryology.
 * EntropiaPlanets Wiki - entropiaplanets.com/wiki/:about MindArk's MMORPG/Virtual World platform Entropia Universe.
 * explain xkcd - explainxkcd.com :dedicated to explaining the popular webcomic xkcd
 * Eternal Lands Wiki - el-wiki.eu :Eternal Lands fantasy MMORPG unofficial wiki

F

 * Fantasy Life Wiki - flwiki.org :Everything about the Fantasy Life game!.
 * Festipedia - festipedia.org.uk :A knowledge database for the Ffestiniog and Welsh Highland Railways.
 * Fiesta Wiki - www.fiestafan.com :The ultimate source for information on the MMORPG online game Fiesta.
 * FileZilla - wiki.filezilla-project.org :FileZilla Documentation
 * Firefall - firefall-wiki.com :a wiki for Red 5 Studios Upcoming free-to-play Tactical Shooter - Firefall.
 * FishPi - wiki.fishpi.org :FishPi : An Autonomous Drop In The Ocean. Design & build a transatlantic autonomous vehicle, controlled by the Raspberry Pi, and powered by solar energy.
 * FIXwiki - fixwiki.org : a Wiki dedicated to the FIX protocol
 * FFXIclopedia - http://wiki.ffxiclopedia.org :THE Source for Final Fantasy XI information.
 * FK Wiki - fkwiki.com : A knowledge-base for the Faculty of Medicine at UGM.
 * Flat Earth Wiki - wiki.tfes.org: The official Wiki of the Flat Earth Society.
 * Flight Instructor Wiki - cfi-wiki.net :Information and Resources for Flight Instructors and their students.
 * Folding@Home - Folding@Home :Folding@Home is a distributed computing project aimed at understanding protein folding, misfolding, and related diseases.
 * Free Geek - wiki.freegeek.org :Free Geek, a nonprofit organization which puts unwanted computers back into use to benefit deserving volunteers and nonprofits.
 * FreeGameDevWiki - wiki.freegamedev.net :Open source game development wiki.
 * Funtoo Wiki - www.funtoo.org : Official Funtoo Website/WIki
 * eFlyFF Wiki - flyff-wiki.gpotato.com: Your guide into the world of Madrigal.

G

 * Gaiapedia - Gaia.Wikia.com : Community dedicated to documenting the largest English speaking forum on the internet. (GaiaOnline)
 * Game Ideas Wiki - gameideas.wikia.com :A wiki about ideas for video games, hosted on Wikia
 * Gamepedia - www.gamepedia.com/ :Collection of wikis about certain video games. Run by Curse.
 * GameWinners - GameWinners.com : Uneditable cheat code website.
 * ganfyd - ganfyd.org : Resource for medical professionals
 * Gardenology - Gardenology.org : Gardening wiki and plant encyclopedia
 * Geeklog Wiki - wiki.geeklog.net :For the open source CMS / weblog
 * Geni Wiki - wiki.geni.com : Wiki for Geni.com, a genealogy site.
 * Gentle Giant Home Page - www.blazemonger.com/GG :Rock band Gentle Giant
 * Gentoo Wiki - wiki.gentoo.org : Official Gentoo WIki
 * GhibliWiki www.nausicaa.net/wiki/Main_Page :A collection of information about Hayao Miyazaki and his works.
 * GishanWiki - wiki.gishan.net : GishanWiki is a collection of university reports and projects.
 * Globulation2 - globulation2.org :The game Glob2
 * 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.
 * GoMediaWiki - gomediawiki.com :Mediawiki skins and extensions
 * Government and Social Media Wiki - GovSM : A wiki tracking the use of social media by government.
 * Grand Comics Database - docs.comics.org/wiki/Main_Page :Documentation for the web site database interface and error tracker
 * GridPP - https://www.gridpp.ac.uk/wiki/Main_Page :GridPP, UK Computing Grid for Particle Physics.
 * 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.
 * Gungfu Dojo - Gungfu WikiDojo Listings :The Online Resource of Martial Arts Schools, Training Centers, and Dojos throughout the world and the USA.
 * 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.

H

 * Hardware Book - www.hardwarebook.info :Cable and connector pinouts along with technical specs of computers and consoles.
 * HE FAQ faq.he.net :Information for Hurricane Electric customers.
 * Health++ - www.healthplusplus.com :HealthPlusPlus is a wiki about health, also a medical knowledge base, an online medical encyclopedia.
 * Health and Medicine Wiki - health-and-medicine.wikia.com : a Wiki about Health and Medicine, mostly written by Fuse809 (talk), hosted by Wikia. It, as of 15:17 28 Jan 2015 (UTC), has 920 pages and 950 files.
 * HeroSmash Wiki - herosmashwiki.com :A wiki for Artix Entertainment's Flash Based MMO - HeroSmash.
 * Hitchwiki - hitchwiki.org :Information about hitchhiking.
 * Homestar Runner Wiki - hrwiki.org :Knowledge-base about the cartoon series Homestar Runner
 * Hortipedia - en.hortipedia.com :garden encyclopedia, plants, plant database
 * Hortipedia commons - commons.hortipedia.com :Media Repository - more than 20.000 pictures of plants


 * HostelManagement.com - Hostel Management Wiki :Community-written documentation and resources on how to start and manage backpacker hostels.
 * howtopedia.org - http://www.howtopedia.org :(en,fr,es) Howtopedia is a library for practical knowledge and simple technologies. It focuses on development tools.
 * Hymns Without Words - www.hymnswithoutwords.com :Hymns Without Words is a resource of downloadable recordings of hymns and carols that are suitable for use in services.
 * HelioHost - wiki.helionet.org :Articles related to HelioHost and it's services for HelioHost customers.

I

 * India Water Resources Information System (India-WRIS) Wiki - www.india-wris.nrsc.gov.in/wrpinfo
 * This wiki is a part of the India-WRIS Project website. This website aims at providing single window solution to water resources in India. Since the main website is mostly map based, the wiki takes care of the other content like text and images. It is edited and maintained by a dedicated team.


 * ICANN Wiki - ICANNWiki.com
 * 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
 * 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.
 * infoAnarchy Wiki - infoanarchy.org :Information related to file sharing, copyright, the gift economy, cyber liberties, peer to peer research, information tools, and similar topics
 * 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.
 * Internet Movie Firearm Database (IMFDB) - www.imfdb.org :A wiki listing the occurrences of different firearms in Film, Television and Video Games.
 * IpbWiki - www.ipbwiki.com :Integration of Invision Power Board with Mediawiki.
 * ISOGG Wiki - ISOGG Wiki :Genetic genealogy information from the International Society of Genetic Genealogy.
 * IIwiki - iiwiki.com :A wiki for roleplaying related to the online game NationStates.

J

 * JustWiki - justwiki.net
 * JustWiki is educational website for Indian Students preparing for UPSC and other competitive exams.


 * Janapar - www.janapar.org :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
 * Jmol - Jmol wiki :Jmol is a Java molecular viewer for three-dimensional chemical structures.
 * Journalists' Workspace - Journalists' Workspace :Closed wiki for use by Wikinews accredited reporters working on embargoed and investigative reports

K

 * Kenya.or.KE -kenya.or.KE : The Kenya we know - the Free Kenyan encyclopedia that anyone can edit. A Wiki about the country Kenya
 * Know Home Schooling - knowhomeschooling.com :Home Schooling Guide
 * Kodi Wiki Manual - kodi.wiki :The online manual for Kodi® media center (formerly Xbox Media Center), the free open source (GPL) multimedia-player for the Xbox™ from Microsoft.
 * KoL Wiki - kol.coldfront.net : Information and spoilers for Kingdom of Loathing, a web-based MMORPG
 * Krass - krass.com :Techno in Barcelona, Germany and London.
 * Kreosite - kreosite.com :Information on all the Kre-o sets released by Hasbro

L

 * LEGO Ideas Wiki - ideas.brickimedia.org :An encyclopedia for LEGO Ideas projects, users and more.
 * Libregamewiki - libregamewiki.org :Free as in freedom video gaming
 * LibriVox Wiki - wiki.librivox.org :LibriVox provides free audiobooks from the public domain.
 * LifeWiki - conwaylife.com/wiki :A collection of patterns and information about Conway's Game of Life
 * Lingua Veritas Lingua Veritas - Translation interpretation :A Wiki-based multilingual resources agency
 * Linux Questions - wiki.linuxquestions.org :A General Linux Self-service Technical Support Forum
 * Little Rock Renaissance - http://honors.uca.edu/wiki :All things Central Arkansas
 * Linux Shell Scripting Wiki - bash.cyberciti.biz :This tutorial is a beginners handbook for new Linux users / Sys admins and school students studying Linux or computer science.
 * Living Control - Livingcontrol.com :Information about Living Control and its products.
 * LiquidsWiki - liquidswiki.com :Equipment for Handling and Processing Liquids.
 * 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.
 * LÖVE - love2d.org/wiki :The API reference for the LÖVE game engine.
 * LyricWiki - LyricWiki.org :Over 200,000 songs w/no annoying banners or pop-ups.
 * LibreCAD wiki - wiki.librecad.org :This is the LibreCAD Wiki. It is a place for the community to collaboratively assemble and organize knowledge and information related to LibreCAD useage, usability, design and development.

M

 * Madde14/English - madde14.org/english :An online database on migration and asylum.
 * Mario RPG Universe - wiki.mariorpguniverse.com :Wiki devoted to the Mario role-playing game series.
 * Super Mario Wiki - Mariowiki.com :A wiki about Nintendo's Super Mario series.
 * MansonWiki - MansonWiki.com :A wiki devoted to industrial rocker Marilyn Manson and his eponymous band.
 * Marvel Comics Database - marvel.wikia.com/Main_Page :Marvel Comics information and image database
 * MechQuest Wiki - mqwiki.com :A wiki for Artix Entertainment's Flash Based Web RPG - MechQuest
 * Men of War - Wiki - www.menofwarwiki.com :The unofficial community-wiki on the real-time strategic video-game "Men of War"
 * Mercury Rising Fanon Wiki - Mercury Rising Fanon Wiki :Fanon wiki for 1998's Mercury Rising and its expanded universe content
 * Met Wiki - MetWiki.com :The New York Mets players, seasons, games, trades, and other info
 * MetaBase - BioDatabase.Org :MetaBase is a user contributed database of databases, listing all the biological databases currently available on the internet
 * Metroid Wiki - www.metroidwiki.org/wiki/Main_Page :A wiki dedicated to Nintendo's Metroid franchise. The wiki contains in depth information on everything Metroid
 * MFBWiki - mfbwiki.org :Recording the history of Melbourne's Metropolitan Fire Brigade
 * Minecraft Wiki - Minecraft.gamepedia.com :A wiki dedicated to gathering useful information related to Minecraft, a Java-based computer game created by Notch
 * MineZ Wiki - MineZwiki.net :Strategic information source for MineZ, the multiplayer zombie apocalypse game-mode for Minecraft inspired by DayZ
 * Miraheze Meta - Meta: Meta coordination page for Miraheze wikis
 * MixesDB - MixesDB.com :Database for DJ Sets and tracklists
 * Monoskop - monoskop.org :A wiki for art, culture and media technology
 * Moodle Documentation - Moodle Docs :Documentation for Moodle, an open source educational course management system
 * MoparWiki - MoparWiki.com :The simple goal of becoming the single best source of anything having to do with Mopar cars and trucks
 * Mozilla Wiki - wiki.mozilla.org :Plans of software development of the Mozilla Foundation
 * Mozillazine Knowledge Base - kb.mozillazine.org :Semi-official knowledge base about Mozilla products
 * Mountwiki - mountwiki.com :Wiki containing information about mountains and routes
 * MPedia - mpedia.dan.info :A wiki encyclopedia on the subject of Mensa, the high-IQ society (An independent project not affiliated with, owned by, or endorsed by Mensa)
 * MusicProf - MusicProf.org :An Instrument For Music Notes
 * MuslimWiki (Mw) MuslimWiki.com :The open encyclopedia on Islamic Subjects and the Muslim world from the Muslim perspective
 * My Research Wiki - research.chanur.com :Genealogy research notes
 * MyraPedia - myra.wikia.com :Create fantasy detail with art and stories in one of the oldest SharedWorld projects around the world Myra

N

 * NDTWiki - www.NDTWiki.com :Non Destructive Testing Wiki
 * Neverwinter - nwn.wikia.com :A Wikia that documents Neverwinter Nights.
 * NinWiki - ninwiki.com :Wiki for the band Nine Inch Nails
 * Nissan 350Z & 370Z Wiki - www.350z-tech.com :Info on the Nissan 350Z and a few other cars.
 * NY Canals NY Canals.com :Information and cruising guide to the New York State Erie, Oswego, Champlain and Cayuga-Seneca Canals.
 * Nordic Names - nordicnames.de :Origin and meaning of Scandinavian first names.
 * NSindex - nsindex.net :A general encyclopedia about NationStates, a browser-based nation simulation game.
 * Numberzoom - numberzoom.com :Reverse phone number lookup, Caller ID lookup and list of unknown telephone numbers including collection agencies and telemarketers.

O

 * Objectivism Wiki - wiki.ojectivismonline.net :A wiki for Ayn Rand's philosophy of Objectivism
 * OCESS Wiki - wiki.spacesim.org :Wiki for the Ottawa-Carleton Educational Space Simulation
 * OEIS Wiki - oeis.org/wiki :Wiki for the Online Encyclopedia of Integer Sequences
 * Octopus Wiki - tddft.org :Software for the quantum simulation of the excited dynamics of molecules.
 * Offwiki - offwiki.org :Community dedicated to improving Wikipedia by discussing and testing ideas for onwiki adoption.
 * 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 Circuits - www.opencircuits.com :A wiki for sharing open source electronics knowledge, schematics, board layouts, ports and parts libraries.
 * Open Semantic Framework (OSF) Wiki - http://wiki.opensemanticframework.org :Wiki for the Open Semantic Framework open-source semantic technology software stack, including about 500 articles on technical aspects of installing, managing and using OSF, plus general semantic Web topics
 * Openbox - openbox.org :Openbox window manager
 * OpenMW - openmw.org :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
 * 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
 * OrthodoxWiki - orthodoxwiki.org :An open-content encylopedia of Orthodox Christianity
 * OSDev - wiki.osdev.org
 * OverSoul Wiki - oversoulwiki.com :The original wiki for Artix Entertainment's Flash Based MMO - OverSoul.

P

 * Presidential Polls - http://presidentialpolls-2016.com/ :The community-built resource that focuses on alternative, clean, practical, renewable energy solutions.
 * PCGamingWiki - pcgamingwiki.com :Information, tips, hacks and fixes for PC games.
 * 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.
 * Physlab - physlab.lums.edu.pk :The new website of the Experimental Physics Laboratory at School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan.
 * PidgiWiki - http://www.pidgi.net/wiki/ :the video game media repository
 * PinataIsland.info - http://PinataIsland.info :Dedicated to the Viva Piñata Xbox 360 game and television series
 * Planet Nepal http://www.planetnepal.org :Nepal Encyclopedia Project
 * Plant Encyclopedia (The) ThePlantEncyclopedia.org :The global guide to cultivated plants.
 * Pl@ntUse - uses.plantnet-project.org/en : useful plants of the world and their uses, a study case of Pl@ntNet plantnet-project.org
 * PLAWiki - PLA Wiki :Satire wiki about open source, established by PLA - Penguin Liberation Army
 * PlentyWiki - www.theplenty.net/wiki/ : Realm of the Elderlings and other creations of Robin Hobb/Megan Lindholm
 * PonyVSPony Wiki - ponywiki.com :A wiki for Artix Entertainment's Flash Based PvP - Pony Vs Pony!
 * Pornopedia - en.pornopedia.com: Erotic encyclopedia
 * PortlandWiki - portlandwiki.org :Civic wiki for Portland, Oregon.
 * Poser and Daz Studio Free Resources Wiki - https://poserdazfreebies.miraheze.org/wiki/Main_Page :Links and descriptions of legally-free content for the 3D-art programs Poser and Daz Studio
 * Programmers' Society - progsoc.org :A society at University of Technology, Sydney
 * ProofWiki - ProofWiki.org :A dictionary of mathematical proofs.
 * 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.
 * PsychWiki - www.psychwiki.com :Creating a collaborative resource and compendium of practical knowledge about psychological research.
 * Pub Night - Pub Night :A wiki dedicated to Real Ale pubs, primarily round Cheltenham but spreading slowly outwards.
 * PyMOLWiki - www.pymolwiki.org : Community support site for the molecular visualization program, PyMOL.
 * Pynchon Wiki - www.pynchonwiki.com :Explores all the novels of Thomas Pynchon - 6 wikis.
 * Pzwiki - www.pzwiki.net : A wiki for the indie game Project Zomboid.

Q

 * Qi Hardware - qi-hardware.com :Copyleft hardware project.

R

 * RationalWiki - rationalwiki.org
 * RayWiki - raymanpc.com/wiki : Free encyclopaedia about Rayman
 * 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.
 * RizonWiki - Rizon Wiki :Rizon Network's Knowledge based Wiki for FAQ and Information relating to the network.
 * Roblox Wiki - wiki.roblox.com :Teaches you how to Use, Play and Build on a free online Multiplayer game called Roblox.
 * Rodovid - rodovid.org : The généalogical three wiki.
 * RouteXL - routexl.nl :User manual for a multiple destinations route planner
 * RTAW Reefpedia - RTAW Reefpedia :Reefing the Australian Way Reefpedia, providing and information resource on the keeping of a marine aquarium for Australian hobbyists.
 * RuleML Wiki - RuleML Wiki :About the RuleML Knowledge Representation Language and the organization, RuleML, Inc., that develops it.
 * RuneScape Wiki - RuneScape Wiki :A large database containing information on the game RuneScape, hosted by Wikia.

S

 * S1mp3 project - wiki.s1mp3.org :Information related to the S1 Mp3 Player
 * Saint Wiki - www.saintwiki.com :A free repository of Catholic resources.
 * SA-MP Wiki - www.wiki.sa-mp.com :The official page of SA-MP, a mod where you can play Grand Theft Auto San Andreas online with your friends.
 * sasCommunity.org - sasCommunity.org :The place for all users of SAS software to gather to share information.
 * Scan New England - Scan New England : Covering the radio communications hobby for the New England area of the USA.
 * ScottishClimbs- www.scottishclimbs.com :A site about climbing in Scotland.
 * ScoutWiki - en.scoutwiki.org :Free scouting encyclopedia in English.
 * Scramble - scramble.nl :All about aviation.
 * Scratch Wiki - wiki.scratch.mit.edu :A Wiki about the programming language Scratch.
 * SDIY wiki - www.sdiy.info :A wiki for learning about DIY electronic musical instruments and related equipment.
 * SDW (Sleeping Dragons Wiki) - sleepingdragons.org/sdw :Documents campaigns by Sleeping Dragons, a private tabletop roleplaying group.
 * Second Life - wiki.secondlife.com :Official Second Life's Wiki
 * Sega Retro - http://segaretro.org :Encyclopedia of Sega-related media.
 * ServerWiki - www.serverwiki.org :For Game Server Administrators, covers setup and installation of all different kinds of Game Servers on various Operating Systems.
 * SgWiki - http://sgwiki.com/ :Singapore wiki, mostly about public transport there.
 * Shadowlack Codex - shadowlack.com/wiki :An original science fiction and fantasy world building (conworld) project.
 * Shartak Wiki - shartak.com :Web-based MMPORPG, set on a mysterious island where natives and outsiders hunt and explore.
 * Sikhi Wiki - sikhiwiki.org :Encyclomedia of the Sikhs
 * 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.
 * SmashWiki - http://www.ssbwiki.com/Main_Page :A wiki for the Nintendo game franchise Super Smash Bros.
 * SME Server - http://wiki.contribs.org/Main_Page :Official wiki for the SME Server.
 * Smite Wiki - Smite Wiki :Wiki dedicated to Hi-Rez Studios online computer game SMITE.
 * Snickipedia&#x3A; The Lemony Snicket Wikipedia - www.snicket.wikia.com :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.
 * Softview - SoftView.tk :Test site for MediaWiki and common extensions.
 * Sonic Retro - http://info.sonicretro.org/ :Encyclopedia of Sonic The Hedgehog-related media.
 * Source Watch - sourcewatch.org :Directory of the people, organizations and issues shaping the public agenda. Focus on propaganda (formerly "Disinfopedia")
 * Speedypedia - en.speedypedia.info :A new free encyclopedia.
 * SporeWiki - sporewiki.com :SporeWiki is the knowledge base dedicated to Spore - the computer simulation video game developed by Wright Will Wright
 * SpottersWiki - SpottersWiki.com :Guide to airport spotting and photography locations
 * Stadtwiki Karlsruhe - ka.stadtwiki.net :city wiki for Karlsruhe, Germany
 * Star Trek Online Wiki - STOWiki.org :Star Trek Online MMORPG Wiki
 * Stefan Zweig Bibliography Wiki - zweig.fredonia.edu :Stefan Zweig Bibliography Wiki
 * Stellarium Wiki – stellarium.org :Stellarium is a free planetarium for your computer
 * StrategyWiki - StrategyWiki.org :Collaborative source for copyleft video game FAQs, walkthroughs, and strategy guides.
 * Stunts Wiki - stunts.hu/wiki :Information, resources, history and whatever else related to the classic racing game Stunts (aka 4D Driving).
 * Substepr - Substepr.com :One of the first serious attempts at an open research website: Higher quality standards than WikiHow or eHow.
 * Sunshine Review - SunshineReview.org :An encyclopedia dedicated to open government through the sunshine of transparency.
 * Sweetnam.eu - sweetnam.eu :Personal website of a I.T. Technical nature.
 * en.Swpat.org - en.swpat.org :The software patents wiki
 * SynSIG - synsig.org :promote the study of Speech Synthesis in general.

T

 * Teaching Open Source - teachingopensource.org
 * A neutral collaboration point for professors, institutions, communities, and companies to come together and make the teaching of Open Source a global success.


 * Team Fortress Wiki - wiki.teamfortress.com : Wiki site for anything related to the videogame Team Fortress 2
 * Teampedia - www.teampedia.net/wiki/index.php?title=Main_Page
 * A collaborative encyclopedia of free team building activities, icebreakers, teamwork resources, and tools for teams.


 * Techotopia - Techotopia.org :A library of free on-line IT books
 * TechWriterWiki - TechWriterWiki.com :A practical on-line reference for professional Technical Writers/Communicators.
 * TeflPedia - TeflPedia.com :Wiki for English teachers.
 * Telarapedia - Telarapedia : A wiki for the MMORPG Rift: Planes of Telara.
 * Terraria Wiki - wiki.terrariaonline.com/ : The official Wiki for Terraria.
 * Admin tools Test Wiki - testwiki.x10.bz : A wiki where anyone can become a admin and test their rights.
 * TFWiki - TFWiki.net : Knowledge database dedicated to the various Transformers characters, episodes, comics, and toylines.
 * The Aquarium Wiki - The Aquarium Wiki : The encyclopedia of all things aquatic.
 * The Chemistry Book - The Chemistry Book: An online chemistry textbook.
 * The Cutting Room Floor - The Cutting Room Floor: A wiki dedicated to finding unused and cut content in video games.
 * The Infosphere - theinfosphere.org :A wiki for all Futurama related info.
 * The Internet Wiki - theinternetwiki.com: An encyclopedia of the things that run and maintain the internet, the people behind the internet, and ideas, controversies, laws, etc. that concern the internet.
 * The IT Community - www.theitcommunity.com :The wiki knowledge base from IT guys, for IT guys.
 * The Mana World - The Mana World Wiki : TMW is a 2D MMORPG. Wiki document gaming and development aspects.
 * The Mickey Wiki - The Mickey Wiki :Unofficial encyclopedia on everything Walt Disney World
 * The Pet Wiki - The Pet Wiki :Info about pets and how to care for them.
 * The Spaghetti Western Database - www.spaghetti-western.net:The biggest English-language encyclopedia of European Western Cinema
 * The Wiki Fire - The Wiki Fire : The unofficial, free encyclopedia of Knox College in Galesburg, IL
 * Theobio Wikis at McMaster University - Projects; Dushoff Lab; Worden : Over 100 wikis for research collaborations. Home of the WorkingWiki extension for wikis supporting collaborative coding and authoring of publication-quality manuscripts
 * Thinkerpedia - thinkerpedia.net :The critical thinking wiki
 * ThinkWiki - thinkwiki.org :Linux distributions on IBM/Lenovo ThinkPads
 * This Might Be A Wiki - tmbw.net :Wiki for all things They Might Be Giants
 * 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
 * Trail WIKI - TrailWIKI.org : A collaboration of trails across the United States.
 * Trailville - trailville.com : Hiking Trails, Cross Country Ski Trails, Bike Paths, Mountain Bike Trails, and Canoe & Kayak Water Trails.
 * Translatewiki.net translatewiki.net :Free Open Source Software localisation wiki-style
 * Trauma and Dissociation project - www.dissociative-identity-disorder.net :A wealth of information about the mental disorders caused by trauma
 * TSR Wiki - thestudentroom.co.uk :The Student Room, Information for students
 * The TV IV - tviv.org :An online compendium of television knowledge
 * TelenovelaWiki - telenovelawiki.com :Read full information on thousands of Telenovelas.

U

 * UBC Wiki - UBC Wiki : The University of British Columbia Wiki.
 * ukcider - ukcider.co.uk/wiki :A wiki about different types of cider and perry.
 * 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
 * Uncyclopedia - en.uncyclopedia.co :Satirical parody of Wikipedia, see Uncyclopedia.
 * Unified Republic of Stars - unifiedrepublicofstars.com/wiki :A collaborative story telling project based around a new and unique science-fiction world.
 * Uniting Amendment - Uniting Amendment :The comprehensive amendment to the Constitution written by the citizens of the United States
 * Unofficial Elder Scrolls Pages (UESP) - uesp.net :The wiki about the Elder Scrolls series of games.
 * UOGuide - UOGuide.com :An encyclopedia on the MMORPG Ultima Online
 * Urban Dead Wiki - wiki.urbandead.com : A Massively Multi-Player Web-Based Zombie Apocalypse. MMPORPG.

V

 * Valve Developer Community - developer.valvesoftware.com :Information about Valve's SDK and Tools
 * Vanipedia - vanipedia.org/wiki/Main_Page :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.
 * Video Game Music Covers Wiki - video-game-music-covers.wikia.com :A wikia about VGM Cover Artists
 * The Vim wiki - vim.wikia.com :A wiki dedicated to the cross-platform Vim editor
 * Visual KoL - kol.coldfront.net/thekolwiki/index.php/Main_Page :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

 * Watch-Wiki :The free watch encyclopedia in several languages - is an on-line reference about watches.
 * WebPlatform - docs.webplatform.org : Community-driven site that aims to become a comprehensive and authoritative source for web developer documentation.
 * WeRelate - werelate.org : The world's largest genealogy wiki
 * Wesnoth - wiki.wesnoth.org :Website and wiki for the Battle for Wesnoth project, a free turn-based strategy game
 * Where to See Wildlife - wheretosee.org/wildlife/Main_Page :A website dedicated to finding the best locations to see wildlife.
 * WICWiki - www.wicwiki.org.uk :Christian website which contains over 25,000 articles, covering a variety of subjects.
 * Wiki24 - 24.wikia.com :Everything there is to know about the hit television series 24
 * Wiki4Games - Wiki4Games.com : A wiki about video games.
 * Wikia - www.wikia.com :A network of MediaWiki sites on many topics
 * WikiAudio - WikiAudio.org : User created Encyclopedia and database project for all things audio or sound related.
 * WikiChip - WikiChip.org :A computer-related knowledgebase
 * WikiDifferences- WikiDifferences.com : A difference-between manual.
 * WikiDrivers - Wikidrivers :Device drivers for video, sound, storage, networking and input devices, chipsets and CPUs.
 * Wiki Farming - wikifarming.org :A Manual on Agriculture
 * Wikifashion - wikifashion.com :Where fashion lovers can catalogue clothes, designers, shows and all things fashion.
 * WikiGTA - WikiGTA.org : Grand Theft Auto Walkthrough
 * wikiHow - wikihow.com :A How-To Manual
 * WikiIslam - WikiIslam :Online resource with articles on various areas of Islam based on its own sources, the Qur'an, hadith and Islamic scholars.
 * WikiKrishna - www.wikikrishna.com: Wiki of Hindu vedic scriptures, songs, lyrics, etc.
 * WikiLectures - www.wikilectures.eu: Online study materials for medical students.
 * WikiLou - www.wikilou.com :A collaborative wiki about St. Louis, Missouri and the surrounding area.
 * WikiMANNia - en.wikimannia.org :wiki site dedicated to the knowledge of discrimination.
 * 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.
 * WikiPathways - WikiPathways.org :Biological pathways curated by the scientific community.
 * WikiQueer - WikiQueer.org :Encyclopedia and resource hub project specifically for and by the lesbian, gay, bisexual, transgender, questioning, and allied communities.
 * Wikireedia - wikireedia.net :Academic and general interest site
 * Wikisimpsons - Simpsonswiki.net :The best Simpsons wiki on the internet.
 * WikiRun - wikirun.com :A running encyclopedia.
 * Wikishire - wikishire.co.uk: A wiki about Britain, Ireland and the British territories.
 * Wiki-site - wiki-site.com:Wiki-Site.com allows you to open and manage a free wiki site.
 * Wikisocion - wikisocion.org : Encyclopedia of socionics
 * WikiSummary - WikiSummary : Summaries of Academic Books and Articles
 * Wikiwrimo - wikiwrimo.org :A wiki for everything related to National Novel Writing Month, Script Frenzy, and the Office of Letters and Light.
 * Wireless Africa - wirelessafrica.meraka.org.za :Home of the CSIR, Wireless Africa, Community Owned Information Network.
 * Without Vowels - withoutvowels.org :Site for researching all meanings of Old Testament without vowels.
 * Wixpert - www.Wixpert.com :A commercial encyclopedia wiki that lets writers make money for their work.
 * The Wonderful Wiki of Eamon - eamononline.com/wiki: Public wiki for the classic Eamon text adventure series and other related games.
 * Wookieepedia - starwars.wikia.com:Wiki about Star Wars run by Wikia
 * WordPress Codex - codex.wordpress.org :Online Manual for WordPress
 * World Wind Wiki - worldwindcentral.com :Knowledge base about NASA's World Wind
 * Wowpedia - Wowpedia.org :The game World of Warcraft, by Blizzard Entertainment.

X

 * 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.
 * 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).

Y

 * Yellpedia - Yellpedia : The first complete United States Yellow Pages that's also a wiki. Over ten million listings (pages) waiting to edited.
 * YourSexWiki - Yoursexwiki : Illustrated Wiki Project about all aspects of sexuality
 * Yo-Yo Wiki - yoyowiki.org :Information about the toys called Yo-yo

Z

 * Z64 Wiki - wiki.spinout182.com :N64 Zelda hacking wiki.
 * Zelda Wiki.org - Zelda Wiki.org :A group effort of several fan sites to cover the games of The Legend of Zelda series.

MediaWiki-ready hosts
Some hosts in alphabetical order: ... or any other host using PHP/MySQL
 * MediaWiki Optimized Web Hosting Providers. Comparisons.
 * 1&1 Internet
 * BlueHost
 * FusionHost
 * Host Color
 * Hostingplex
 * HostMonster
 * Hurricane Electric
 * IXWebHosting
 * LoopByte
 * Midphase
 * MyWikis
 * MilesWeb★
 * Omnis Hosting
 * Vistapages
 * Web Hosting Hub