Rhino 3d - I LOVE and highly recommend this software. I use it daily. -if CAD is all numeric precision- like gears -and MAYA is pointcloud art - like a sculpted bunny Rhino is in the middle- A cute bunny with accurate gears inside. -Intuitive and easy to use - Good for important or exporting to most other 3d software. - Has a nice suite of plugins for rendering, animation, tooling and jewelry. - Well priced and student/teacher discounts.