We at Nanowerk do not endorse or encourage piracy at any level or in any form. While looking through 3D print websites for free 3D STL files, all the responsibility falls on you to check the copyright ...

editing STL files, or repairing meshes. Below are my favorites, which I use for different purposes. FreeCAD is a free and open-source 3D printing tool for designing 3D models ready for 3D printing.

As someone who's really into 3D printers, this opens up a whole new creative avenue for me to finally start creating my own models to print, instead of searching online for free STL files.