http://www.stlfinder.com/

http://www.shapeking.com/

http://www.3dcreationlab.co.uk/gallery-of-3d-printing-projects.php

https://www.redpah.com

http://3dfilemarket.com/

http://www.turbosquid.com/

https://3dwarehouse.sketchup.com/

http://us.gallery.xyzprinting.com/

http://www.3dshook.com/

http://www.yeggi.com/

https://www.youmagine.com/

https://www.3dhubs.com/

http://forge.zheng3.com/

https://www.trinpy.com/

http://3dprintingforbeginners.com/3d-model-repositories/