http://blog.stackoverflow.com/2009/12/stack-overflow-gives-back/ http://blog.stackoverflow.com/2009/12/stack-overflow-gives-b... And that just covers the very

http://blog.stackoverflow.com/2009/12/stack-overflow-gives-back/ http://blog.stackoverflow.com/2009/12/stack-overflow-gives-b... And that just covers the very specific case of giving an existing project money, and does not cover things like Jetbrains' program that gives free licenses for open source work, Google's Summer of Code program, and various organizations contributing code back to an OSS project.