Blender is a free 3-D software that lets you create whatever model you want. Its difficulty is based on how well you know the hot keys. I like to use this program a lot with Garry's Mod to see how well I can make body armor or some kind of car part. I spend most of my time learning more about blender and what I can do with it.
3 d scanner No design skills, 3D modeling or CAD expertise required to get started. Outputs standard 3D design file formats that can be modified and improved in third-party 3D modeling programs, like Autodesk’s free software MeshMixer.
Sweet Home 3D - Draw floor plans and arrange furniture freely. A free interior design application that helps you place your furniture on a house 2D plan, with a 3D preview. Download onto own computer – PC or Mac.
Chicago's Harold Washington Public Library to offer Free Maker Lab with 3D Printers, Laser Cutters, Milling Machines, Vinyl Cutter and Computers with Meshing and Sketching Software. Available to the Public July 8 - Dec 31