Tomorrow, Saturday September 15, is Software Freedom Day, a “worldwide celebration of Free and Open Source Software.” Hundreds of teams around the globe will be holding local events to promote software freedom. Search for a team near you.
Creative Commons supports free software and actively develops a number of free software projects. Tomorrow would be a great day to hack on some CC software, maybe work on a patch or try your hand at a developer challenge. Visit the developer page on our wiki for more ways to get involved!