Allegro is a cross-platform library mainly aimed at video game and multimedia programming. It handles common, low-level tasks such as creating windows, accepting user input, loading data, drawing images, playing sounds, etc. and generally abstracting away the underlying platform. However, Allegro is not a game engine: you are free to design and structure your program as you like.

Homepage: http://liballeg.org/

First approach to create game in c# with cvs for game jam. Will use Mono (MIT/BSD/Apache2 licenses) and MonoGame (Microsoft Public license). Game itself is zlib licensed (due to MonoGame license compatibility)