All Guides: 3D Printing at Stanley Library: Free 3D Software

Watch the 3D Printer at Work!

SketchUp
"SketchUp is 3D modeling software that's easy to learn and incredibly fun to use. Download SketchUp today for free and get started drawing in 3D."
uMake
"Create 3D content anywhere you are. uMake is the best way to transform your thoughts into jaw-dropping 3D creations. All from your iPad."
Sketch 3D
"Sketch 3D is a tool for designing 3D models from your fingertips. You could download models from others, and could also share your great designs with other users by saving models in Public space."

Thingiverse- Makerbot's giant repository for sharing and finding printable 3D designs
Yeggi- Great search engine for finding 3d models on the web
Ponoko Make, share, buy or sell 3D product designs
Smithsonian X3D - Provides free models of objects in the Smithsonian collection, complete with museum information. Great for academic projects!
3D Printer Directory - Lists a number of sites were free 3D models can be found
Pinshape - Find, upload, or sell 3D project designs
Tinkercad - Fantastic collection of 3D software tools