Cdw - cdw: ncurses interface for GNU/Linux command line CD/DVD tools
SketchUp - 3D for Everyone
Sirius - An open-source clone of Siri from UMICH
Assetforge - Asset Forge allows anyone to create 3D models and 2D sprites using building blocks.
Microsol Resources - Autodesk Platinum Partner providing BIM & CAD software, training, consulting, staffing & 3D printing for architecture, engineering & construction.
FreeCAD - An open-source parametric 3D modeler