Open source library for creative expression on the web, desktop, etc.
A cross platform Lua based game engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
3D .NET engine for Windows, Linux, Mac
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Cross platform Game Creation Software
Hungry Hero is an open source Flash game built on Starling Framework.
A cross-platform OpenGL based lightweight scenegraph library
Cross-platform 2D game engine