https://blogs.nvidia.com/blog/2018/12/03/phys … ty-open-source/

PhysX will now be the only free, open-source physics solution that takes advantage of GPU acceleration and can handle large virtual environments.

It will be available as open source starting Monday, Dec. 3, under the simple BSD-3 license.

https://www.youtube.com/watch?v=JmzuRXLzqKk