I am just getting back into game development and I am really impressed with XNA. My only problem is that I want a free community based 2d game engine so that I can harness the power of the community. Does anybody know of a good XNA 2d game engine that is currently being supported or Do I just have to write one myself?
FlatRedBall is a good option and is being actively supported. http://www.flatredball.com/frb/