OpenUnivers creates a visual simulation of the Solar System's bodies in 3D. It's main distinction from other programs of this type is that OpenUniverse renders in realtime, allowing you to view all the planets, moons, and other heavenly bodies as they move along their paths. You can zoom around and view the Solar System from any angle. OpenUniverse runs under Linux, most UNIX systems, and Windows.
Release Notes: First public beta.