Unreal Development Kit available for free
Unreal Development Kit (UDK), a free version of the Unreal® Engine 3, the software development framework used to create computer and video games, 3D simulations, etc, was unnounced today. UDK is free for noncommercial and educational use, and is already available for download.
Not to mention, UDK’s physics system, like in Unreal Engine 3, is based on PhysX SDK.
You can find more details at UDK homepage or NVIDIA UDK page.
