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
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
A cross-platform OpenGL based lightweight scenegraph library