As a reaction of this question, I wanted to propose a site similar to careers.stackoverflow, but for creating, recruiting and contributing to open-source projects.
To be clear, this is not a suggestion of creating a new StackOverflow-site, only with questions related to open-source programming issues etc., it's a site for finding projects to contribute to and getting help from people wanting to contribute.
To my knowledge, this is an unusual site for the Stack Exchange community, so I want to get some feedback on the concept before listing further ideas.
Off-topic:
I've been reading through the FAQ, browsing the site for an hour or so, but I'm still confused if I'm asking this question the correct place. So please direct me if necessary.