1)   1st Light 3D Solar System Simulator 3.0
1st Light is a fully interactive 3D solar system creation tool and screensaver. The free version allows users to view and load any solar system. The paid version allows users to create their own solar system with any texture and # of planets.

 2)   AbszOrb 3D 3.0
AbszOrb 3.0 is a fully interactive real-time 3D game / screensaver / simulation in which users are able to texture, arrange and otherwise manipulate universes of spinning balls that interact and collide spectacularly in real-time.