A high-performance, industry-standard 2D physics engine built on Box2D
2D JavaScript Physics Engine
A modular Common Lisp game engine
A 2D rigid body physics engine for the web
Amazon Lumberyard is a free AAA game engine
3D C++ Game Engine - yet another open source game engine
A real-time game development platform
Simulate high power rocket flights with splash down plots
3D .NET engine for Windows, Linux, Mac
Physics Game like "The Incredible Machine"
Articulated-body simulation engine written in C
simulations with Lagrangian method,both symbolic and by numeric deriv
Pear3DEngine is a modern and modular 3D development framework
1st 3D game engine built in C# for .NET, Visual3D Engine's predecessor