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, and STEP export.
It's an open-source project (it can also be self-hosted) and was featured on Hackaday in August 2026.
meshlab.net
Free, open-source program for processing and repairing 3D meshes, especially large or messy ones from 3D scans. It can clean up, simplify, fill holes, align scans and convert between formats. MeshLab has been developed…
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…
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…
