A good place to start is http://codemontage.com/ http://codemontage.com/ - the site has links to a few serious nonprofit project(open source) who could use help

A good place to start is http://codemontage.com/ http://codemontage.com/ - the site has links to a few serious nonprofit project(open source) who could use help. Also look at it's resource link, some of the links like random hacks of kindness are interesting.