Collect a list of open source projects for social good.
There are projects out there that aren't getting enough exposures.
Graceful Sadie commented
I think more then a list there needs to be a central place for questions and communication that both showcases the best projects and allows for communication amongst non-profits and developers. Connecting non-profits with the right dev project for them is a challenge in itself. A good starting place is the projects listed here: http://devsummit.aspirationtech.org/index.php?title=2010_Session_List#Featured_Projects_and_Organizations