Games using PhysX (looks like about 20-25):
PhysX technology is [...] the physics platform of more than 300 video games, such as Bulletstorm, Need for Speed: Shift or Castlevania: Lords of Shadow. Most of these games use the CPU to process the physics simulations.
Do you know 3ds Max? It's the industry's most important 3d animation package (those things that games are made with). In its latest version it removed Havok (reactor engine) and replaced it by a PhysX-based engine.
Maya (another one of those things that games are made with)? Uses PhysX as of its latest version, too.