Hosted at http://monogame.codeplex.com/
Says "MonoGame is an Open Source, OpenGL implementation of the Microsoft XNA 4 Framework. Our goal is to allow XNA developers on Windows & Windows Phone to port their games to the iOS / Android / Mac OS X, Linux and later this year PlayStation? Suite and Windows Metro." (2012)
The Cobra community could use a MonoGame example/how-to.
There are other game frameworks listed under DotNetProjects.
