Ev4sio.Physics is a plugin designed for Unity, which aspires to give access to the features and performances of the PhysX library. Although in recent times significant efforts have been made by the Unity team to provide better access to this library, there are still some unused features including:
Moreover, in getting as close as possible to the architecture of PhysX, this tool can more easily evolve and integrate improvements made to the native library. In addition to the physics related functionalities, it also provides different types of singleton as well as a user-friendly state machine system.
Note: this plugin is in Beta version and requires Windows 64-bit (Android and Linux support planned).