Desktop/Android/HTML5/iOS Java game development framework
Open source HTML5 game framework that offers WebGL and Canvas
One framework for creating powerful cross-platform games
Gideros Release version
Game engine supporting many 3D/2D formats and graphic effects
Free and Open Game Programming Language for Windows and GNU/Linux
Reactive extensions for Unity
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
c# lua bind with unity3d project for game development
Educational framework for OpenGLES, OpenCL and OpenAL
Hungry Hero is an open source Flash game built on Starling Framework.
Make games with Lego-like building blocks