The NVIDIA PhysX physics simulation engine is going open source after being introduced 10 years ago (also, thanks Ageia)! It’s available today as open source under the simple BSD-3 license according to a blog post that made the announcement. NVIDIA PhysX is a widely used physics SDK for many game tiles. In fact, it is integrated into the Unreal Engine (versions 3 and 4) and Unity3D game engines. It will be interesting to see what happens here njow that it goes open source.