A multi core friendly rigid body physics and collision detection lib
Cocos simplifies game creation and distribution with Cocos Creator
Simple and light-weight 3D game engine
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform 2D and 3D game engine
A game engine with an emphasis on real-time cutting-edge solutions
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Multi-Joint dynamics with Contact. A general purpose physics simulator
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Descent 3 by Outrage Entertainment
An open source C++ game engine
A flexible, high-performance 3D simulator for Embodied AI research
An open source flight dynamics & control software library
Virtual X-Ray Imaging Library on GPU
Real-time behaviour synthesis with MuJoCo, using Predictive Control
Cross platform Virtual Reality authoring and playback
A free 3D game engine to create games and realtimes scenes for Windows
MIT Licensed Open Source version of Torque3D from GarageGames
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Vivid is a modern C++ 3D engine using OpenGL4+
3D C++ Game Engine - yet another open source game engine