Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free game engine for development of desktop, mobile, and web games
Recreation of the classic Grand Theft Auto III game executable
Cross-platform 2D and 3D game engine with modular architecture
Injectable LUA scripting system, SDK generator, live property editor
scriptable game engine with built-in support for 2D graphics and sound
Mahasona engine is an open source game engine.
A generic 2D engine for any kind of game
TurboSphere is an easy to learn and powerful JS based game engine.
Cross-platform 2D game engine
Cross-platform 2D gaming middleware