A game engine powered by python and panda3d
A modular Common Lisp game engine
Open source library for creative expression on the web, desktop, etc.
A high speed C++17 Vulkan game engine
Vivid is a modern C++ 3D engine using OpenGL4+
The Atomic Game Engine is a multi-platform 2D and 3D engine
Turbulenz is a modular 3D and 2D game framework
2D physics engine for games
Free Android 2D OpenGL Game Engine
Java Client + JS/Canvas Server-Side System, with maintained Objects
Demonstrating the features of jMonkeyEngine 3.