Game engine supporting many 3D/2D formats and graphic effects
An isometric arcade-style game of skill, puzzles and exploration
A free 3D game engine to create games and realtimes scenes for Windows
Amateur 3D Game Engine
Orx: Portable Game Engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Cinema Enters Game Console
2D Game Engine
Modern 3D engine and IDE written using C# and C++.
A cross platform Lua based game engine
Source code of the chapters of the book 3D Game Development with LWJGL
Portable game engine with main focus on point-and-click adventures
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
IRB is a game creation toolkit
3D .NET engine for Windows, Linux, Mac
Gaming library
2D game engine for traditional platform games
A game engine written in the D programming language
3D Game Engine
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Mahasona engine is an open source game engine.
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
Educational framework for OpenGLES, OpenCL and OpenAL