Until recently, PS3 game developers had to buy the PhysX SDK (Software Development Kit) from Nvidia in order to use and implement PhysX in games. Announced on Tuesday, Nvidia extended the licensing agreement with Sony, though. This means that registered PS3 game developers can get Nvidia's PhysX SDK for free, from now on. What is interesting though is that according to the official press release, Nvidia made the same agreement with Nintendo. This means that developers for the Wii can now use the PhysX Software Development Kit for free, as well.
