This is a Windows application for drawing lines and surfaces in 3d space.. See screenshots below for an idea of what it can do.
Requirements : it works on versions of Windows with OpenGL (should be Windows 95 on) with sufficient memory - 128 M plus for reasonable speed.
This is freeware - no cost to you, not an evaluation version, no free Trial, no time limit. Also no support and no warranty of any kind.
Since its release in May 2006, Gauss has been downloaded over 4600 times from this site.