Professional CAD designed around touch and Apple Pencil, with full versions for Windows and Mac. It's one of the most approachable precise-modeling tools: sketch, push and pull, then export STEP or STL. A free plan allows a limited number of designs; full features need a subscription.
Shapr3D launched on the iPad in 2016 (from Budapest, Hungary) and is still the go-to choice for designing with a pencil.
onshape.com
Professional parametric CAD that runs entirely in a web browser, with mobile apps for viewing and editing on the go. Files live in the cloud, so there's nothing to install and real-time collaboration is built in. The fr…
freecad.org
Free, open-source parametric CAD for designing mechanical parts, enclosures and anything else that needs exact dimensions. It runs offline on Windows, Mac and Linux and exports STL, STEP and 3MF for printing. FreeCAD ha…
3dslash.net
Block-based 3D modeling that feels like Minecraft with tools: start from a cube and chisel, add and paint blocks to make a model. Very approachable for kids and beginners, with a free plan and paid plans for more featur…
