Thingiverse is a primarily open source website dedicated to the sharing of user-created digital design files.
*Most used at SJNY
The main goal of this webiste it to 'help engineers develop products faster'. The best part of GrabCAB is their large library of free files created by a community of over a million engineers.
Pinshape is a 3D model marketplace that is similar in style to Pinterest, in terms of layout, look and the ability to re-pin favorites. You can either purchase the model from the designer or download the files to print it yourself, if available.
Yeggi is a search engine that will search major 3D printing websites for files that are compatible with 3D printers.
Repables is a very simple site that contains a lot of small, simple 3D models to print. This website aims to be a repository of 3D printed model files, nothing more. It is a barebones website that allows users to upload their files to share, and download files they want to use.
Hongkiat: 35 Websites to Download Free STL Models for 3D Printers
Website providing links to additional 3D files.