Hey Y'all,
I'm looking at ZCad: http://sourceforge.net/projects/zcad/?source=directory
It looks like the kind of 3D CAD package that I've been looking for. It says that it works on Linux but it's zipped with 7-Zip which doesn't seem to be available for CentOS.
Does anyone know if ZCAD or 7-Zip is packaged for CentOS X86-64 somewhere out there?