NVIDIA announced earlier today that its physics simulation engine PhysX 4.0 is now open source under the BSD-3 license.
It's always great when software is made open source for developers to take a look at, and this could be a useful tool for those interested in physic simulations, robotics, and artificial intelligence.
As explained in a blog post, the company decided to make the tech open source so it would be accessible to AI researchers, robotics researchers, and developing self-driving cars.
For game developers specifically, the engine can take advantage of GPU acceleration and can handle large virtual environments (which can be useful for animation and in-game physics).
The PhysX SDK has apparently already been integrated into some popular game engines, including Unreal Engine (versions 3 and 4) and Unity3D.