scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Animation Compression Library
A simple tool to allow Chessmaster 10/11 bot customizations
C++11 cross-platform game engine using SDL2
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
A 3D, fully concurrent game engine
Zen3D is a 3D engine and editor for creating games