STL Repositories
Thangs – https://thangs.com/
Thingiverse – https://www.thingiverse.com/
MyMiniFactory – https://www.myminifactory.com/
Prusa Printers – http://prusaprinters.org/
Cults – https://cults3d.com/
Fab 365 – https://fab365.net/
CG Trader – https://www.cgtrader.com/
Gambody – https://www.gambody.com/
Shapeways – https://www.shapeways.com/marketplace/
YouMagine – https://www.youmagine.com/