You can add basic holes and extrusions, but more artistic modeling is more or less out of the question. However, the editing and sculpting options are reasonably limited. It allows you to import an STL file, extract a mesh from the model, create a solid equivalent shape, and refine it ready for editing. Operating System Compatibility: Windows, macOS, Linuxįree to use and open-source, FreeCAD is a computer-aided design program mainly for the creation of mechanical and technical drawings and models.