There is no spoon
Truespace is a professional 3D modeller developed by Caligari.
Mosquito: I've never heard of Truespace, and only came upon it in my work here. Someone needs to write some things about it here.
Clinton's truespace plugins for Unreal: http://home.mindspring.com/~clintonr/MyTruespace/TSPlug.html
RegularX: should add (or create a new page) for gameSpace too, Caligari's low cost, gamedev orientated 3D proggie. I use it (poorly) for trying to create static meshes for 2k3.
T1: What's the difference between this and Truespace 5 and 6.