Triponic

POV (Persistence of Vision Raytracer) is a high-quality, totally free tool for creating stunning three-dimensional graphics. The Persistance of Vision Ray Tracer (POV-Ray) is an all-round excellent package, but there are two things that particularly make it stand out above the rest of the crowd. Firstly, it s free, and secondly, the source is distributed so you can compile it on virtually any platform.