Free 3D printing models

3D printers are the future. In 2050, 3D printers are expected to be at almost every houses. For people who are interested in 3D printers, the main problem is with 3D models. It is generally difficult to prepare 3D models using 3D drawing programs.... Don't worry. Thanks to many websites that present you lots of free models. Below are some of such websites.

1-) Shapeways
2-) Thingiverse
3-) Threeding
4-) Pinshape

You can download your free model and print it out using 3D printers either with PLA or ABS filaments.
Good Luck...