3D models
3D models to print: platforms such as Printables, MakerWorld and Thingiverse, designing your own models, STL, 3MF and STEP, and licences explained clearly.
Can I sell 3D prints? Licences explained simply
Creative Commons, platform licences and commercial subscriptions explained: when you may sell prints or modify models, and where the limits are.
Creating your own 3D models: programs for getting started
Tinkercad, Fusion, Onshape, FreeCAD, Blender and Shapr3D at a glance: cost, licence, difficulty and tips for designing for 3D printing.
Finding 3D models to print: platforms compared
Printables, MakerWorld, Thingiverse and more: what each platform offers, what is free and how to spot a good model before you download it.
STL, 3MF, STEP and G-code: file formats in 3D printing
Which file formats exist in 3D printing, what STL, 3MF, STEP, OBJ and G-code store and which format you need when.