Enables Roblox developers to use professional software tools
Desktop/Android/HTML5/iOS Java game development framework
Orx: Portable Game Engine
3D .NET engine for Windows, Linux, Mac
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Educational framework for OpenGLES, OpenCL and OpenAL
Scriptable frontend for media applications.
A cross-platform OpenGL based lightweight scenegraph library
Make games with Lego-like building blocks