PDF with nice layout (text below is slightly improved, missing credits)
Ten Things Technical Volunteers Can Do to Make Wikimedia Projects Better 
- Fix an annoying little bug today: Annoying Little Bug
- Help test and localize WikiLove, and implement ideas from the idea log: WikiLove/Idea Log. WikiLove doesn’t just have to be tea and cookies. Make this tool work for you and your community.
- Get involved with other New Editor Engagement projects: New Editor Engagement. New editors means more help for the Wikimedia projects you care the most about. Let’s figure out ways to find great new volunteers.
- Fix right-to-left issues for speakers of Farsi, Arabic, Hebrew and more: https://bugzilla.wikimedia.org/buglist.cgi?quicksearch=rtl. This will bring us one step closer to the sum of all knowledge for every language.
- Give us test cases for the new parser and get involved in the visual editor development: Future. The new parser will enable us to get a WYSIWYG editor that can scale for a top ten website like Wikipedia.
- Test the mobile site on your phone. Tell us how you use Wikipedia while you’re away from your desktop, and how we can make it better. See: m:Mobile Projects
- Prioritize and validate bugs at https://bugzilla.wikimedia.org/. Bug smashing makes everyone’s day better.
- Install and test MediaWiki on Linux, Windows and Mac, and report problems.
- Make Article Feedback data more useful by building dashboards and other tools: Article feedback/Data. There are thousands of ratings, but it’s still hard to see which ones are helpful to authors.
- Build any idea that strikes your fancy as a MediaWiki extension, gadget or patch. Looking for inspiration? Feature map may help.
Your liaison: Sumana Harihareswara, volunteer development coordinator, email@example.com and sumanah on FreeNode IRC.
General pointers for tech volunteers:
- How to become a MediaWiki hacker