CodeTriage
directory of open-source projects with open issues
Fairmondo
free market place in the hand of the users
Helpful
simple and elegant support system
Hound
Your code, always in style.
Hours
Time registration that doesn't suck.
Lale Help
collaborative platform for refugee support
LearnAwesome.org
social network of learners
LumenDatabase
database of legal complaints and requests for removals
planningalerts.org.au
planning alerts for Australians
Upcase.com
learning platform for programming