NVIDIA PhysX is a powerful physics engine which enables real-time physics in leading edge PC and console games. It is a freeware physx acceleration application that's powerful.
Here are some screenshots to illustrate the features and user interface of this application:
PhysX support for nVIDIA GPUs. Screenshot of NVIDIA PhysX - 1680px · 1050pxTweak video card settings for superior performance. Screenshot of NVIDIA PhysX - 416px · 470pxPhysX taps into the GPU for complex physics calculations. Screenshot of NVIDIA PhysX - 1065px · 533px