Fast and lightweight JavaScript game engine built on WebGL and glTF
Game engine supporting many 3D/2D formats and graphic effects
Desktop/Android/HTML5/iOS Java game development framework
Gideros Release version
Arianne is an engine to develop multiplayer online games like Stendhal
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++.
Cross-platform 2D and 3D game engine
8-bit Graphical API for Java
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++.
Build Cross-platform Applications
3D .NET engine for Windows, Linux, Mac
Open-source, cross-platform, C++ game engine for creating 2D/3D games
An advanced flexible game engine for Java.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Java decentralized cross-platform network multiplayer game engine
Educational framework for OpenGLES, OpenCL and OpenAL
Free strategy browsergame engine.