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 has been built by a volunteer community since the early 2000s. Version 1.0 (late 2024) largely fixed the long-standing "topological naming" problem that used to break models when you edited earlier features.
sketchforge3d.com
A lightweight 3D modeler that runs in your browser and keeps your files on your own computer, with no account needed. It covers the essentials: primitive shapes, dimensioned alignment, sketch-based extrude and revolve,…
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…
openscad.org
Free, open-source CAD where you write code to describe a model instead of drawing it. Ideal for parametric parts and customizers; many customizable models on Thingiverse and MakerWorld are OpenSCAD scripts. First releas…
