SaVi is described in introductory material and is used in academic papers and publications.

SaVi is easy to install or to download to compile yourself. Then take a look at the optional but useful Geomview, which adds 3D rendering to SaVi, or the satellite plot scripts.

SaVi is supported via the SaVi users mailing list. There is a SaVi developers mailing list. SaVi is developed at SourceForge and archived.