3D Printer Project Resources

Thingiverse - thousands of 3D printable models sourced from the crowd

https://www.thingiverse.com/

YouMagine - open source 3D designs ready for download

https://www.youmagine.com/

My Mini Factory - 3D printable object-sharing platform

https://www.myminifactory.com/

Pinshape - find, share and sell 3D print files

https://pinshape.com/

GrabCAD - 5,000,000 members sharing ideas and CAD models

https://grabcad.com/

Cult 3D - a French source of quality 3D models

https://cults3d.com/

Repable - repository of 3D printable models

https://repables.com/

STLfinder - the search engine for 3D models

https://www.stlfinder.com/

Yeggi - search engine for 3D printable models

http://www.yeggi.com/

Instructables - crowdsourced projects for 3D printers, CNC, and just about anything else
http://www.instructables.com/