Within each section we have free 3D printing software options, as well as premium, paid options. To make things easier for you, we have split each of these types of 3D printer software into sections. 3D printer software take a variety of different forms: 3D software modeling tools to design 3D models, 3D slicers to slice STL files for printing, and specialist software for fixing errors in your models. 3D printing software programs are key for high quality printing, designing and monitoring - without software, 3D printers are just machines with no direction.