1. 2) Open Dynamics Engine, http://www.ode.org/
2. 3) Bullet Real-Time Physics Simulation, https://pybullet.org/wordpress/
3. 4) NVIDIA Corporation: PhysX SDK, https://developer.nvidia.com/physx-sdk
4. 5) DART: Dynamic Animation and Robotics Toolkit, https://dartsim.github.io/
5. 6) Epic Games, Inc.: Unreal Engine, https://www.unrealengine.com/