GMAX Modeling software
Gmax is a 3D modeling application based on Autodesk's 3ds Max application used by professional computer graphics artists
CNC Code Maker
Cnc Code Maker is a small, simple and FREE 2D CAD/CAM software. It's made in a user-friendly way to be easy to use and understand. It's not as powerful as commercial CAD/CAM programs, but used as a tool when manually creating CNC programs it will be very handy.