Open Source MMORPG Framework
Desktop/Android/HTML5/iOS Java game development framework
2D Game Engine
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
Free and Open Game Programming Language for Windows and GNU/Linux
Build Cross-platform Applications
Open-source, cross-platform, C++ game engine for creating 2D/3D games
2D game engine for traditional platform games
Open Game Bootstrap
3D Game Engine
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Cross platform Game Creation Software
Cross-platform C framework very compact libraries and tools.
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
A generic 2D engine for any kind of game
Multi-threaded 2D Renderer licensed under the Mozilla Public License
A retro style video game engine for RPGs and adventure games.
A truly extensible cross-platform game engine
cross-platform 2d game engine
Cross-platform reimplementation of AMOS BASIC (runtime)
A cross-platform OpenGL based lightweight scenegraph library
Delphi-like IDE for cross-platform game development
Cross-platform 2D game engine
A cross platform 3d c++ game engine