MayaVi is a Python application using The Visualization Toolkit. It also provides modules which are a handy interface to VTK internals in Python. It features an easy to use GUI, and lets you save the visualized scene to PostScript file, PPM/BMP/TIFF/JPEG/PNG image, Open Inventor, VRML or RenderMan RIB files. . And a lot more! MayaVi can be easily modified to do things differently.
