Fast and lightweight JavaScript game engine built on WebGL and glTF
Game engine supporting many 3D/2D formats and graphic effects
Reusable code for building video games with Jogamp NEWT
Open game and rendering engine packed into a JavaScript framework
Desktop/Android/HTML5/iOS Java game development framework
Gideros Release version
Amateur 3D Game Engine
Vivid3D is a C++ IDE/3D engine, with python scripting.
Arianne is an engine to develop multiplayer online games like Stendhal
A simple cross-platform game engine for creating old-school 2D games
A free 3D game engine to create games and realtimes scenes for Windows
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
Modern 3D engine and IDE written using C# and C++.
A 2D game engine and level editor
8-bit Graphical API for Java
Cross-platform 2D and 3D game engine
IGS Labs
Android OpenGL Game Engine
Source code of the chapters of the book 3D Game Development with LWJGL
CSG for jMonkey
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++.