While Nvidia claims PhysX is already the "most popular physics simulation engine on the planet," it turned out to be more important than they realized. PhysX is seeping outside the game engine world faster than ever, with applications in " AI, robotics and computer vision, self-driving vehicles, and high-performance computing." Seeing how it is "foundational for so many different things," Nvidia decided to make the formerly proprietary physics API open source. Nvidia also claims the PhysX SDK is "multi platform" and that it supports a "a wide range of devices, from smartphones to high-end multicore CPUs and GPUs." While specific vendor support isn't mentioned, a quick search through the source code seemingly reveals some flags for AMD GPUs and Android devices. Check out the PhysX SDK video here. 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... It's already integrated into some of the most popular game engines, including Unreal Engine (versions 3 and 4) and Unity3D.