It's impossible to join such a project and start contributing right away. On the other hand, pretty much all those projects want contributors. But they don't se

It's impossible to join such a project and start contributing right away. On the other hand, pretty much all those projects want contributors. But they don't search actively. Mainly you need to follow the bug tracking and mailinglists, then maybe pick a low hanging fruit. There is no such thing as a shallow learning curve in contributing to less than trivial open source software...