FreeCAD

FreeCAD is an open‑source 3D parametric modeling application that lets users create and edit designs by defining geometric constraints and relationships. It supports a workflow where 2D sketches can be extruded, revolved, or otherwise transformed into 3D geometry, and those models can be iteratively refined by adjusting the underlying parameters. The software targets professionals and hobbyists who need a flexible, scriptable environment for mechanical engineering, product design, architecture, and similar fields, while also being usable for educational purposes and casual projects.

The program is built to be extensible, with a modular architecture that allows additional workbenches and scripts to be added, and it runs on macOS as part of its core platform support. Its stable release status indicates that the core functionality is mature and reliable for everyday use.

FreeCAD’s source code is publicly available, encouraging community contributions and sponsorships that support ongoing development and maintenance of the project.