TrueSpace
From FreeSpace Wiki
TrueSpace is a 3D modeling tool, created by Caligari, Inc.
Overview
TrueSpace remains -- while arguably limited and cumbersome -- one of the most popular 3D modeling tools, mainly due to the price; nothing. There's very few programs and/or applications around that can beat TrueSpace in the price department.
Resources
There are numerous resources available for TrueSpace, too numerous to mention here.
See also