Summer of Code
Google Summer of Code project and mentor listings are out. If you are over 18 and studying, you can take part.
Students enrolled for the graduate program can also participate. This is equivalent to an internship opportunity. So, if you want to make some dough and (more importantly) if you are interested in contributing to the open source community, write up a project proposal over the next week, submit it and hope for the best.
Good luck!
Tags: google, GSOC, masters, opensource, summerofcode