Fast and lightweight JavaScript game engine built on WebGL and glTF
Open game and rendering engine packed into a JavaScript framework
Desktop/Android/HTML5/iOS Java game development framework
Open source library for creative expression on the web, desktop, etc.
One framework for creating powerful cross-platform games
Gideros Release version
Game engine supporting many 3D/2D formats and graphic effects
Vivid3D is a C++ IDE/3D engine, with python scripting.
CTFs as you need them
Amateur 3D Game Engine
Reusable code for building video games with Jogamp NEWT
Arianne is an engine to develop multiplayer online games like Stendhal
High-efficiency minimalist C++ wrapper for OpenGL 4.3
PyCAPGE - Python Classic Adventure Point and Click Game Engine
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
Cross-platform 2D and 3D game engine
IGS Labs
CSG for jMonkey
Source code of the chapters of the book 3D Game Development with LWJGL