A free open source Android version of Caravan
An Open Engine for use on the OUYA
C-Lesh is a game programming language for 2D games.
Pye - Javascript Engine For Drawing Fast, Fluid and Dynamic Pie Charts
An Action Adventure Space Physics Game
cross-platform 2d game engine
Cross-platform 2D game engine
2D Graphics Library
A powerful cross-platform and open-source 3-D rendering engine.
Java based Open source Voxel Engine for RTS games