OpenSCAD

The Programmers Solid 3D CAD Modeller

OpenSCAD Chat: #openscad (on IRC network libera.chat)
OpenSCAD on Mastodon
OpenSCAD Tutorial on Wikibooks
Find OpenSCAD Designs on Printables and Thingiverse

OpenSCAD is software for creating solid 3D CAD objects.

It is free software and available for Linux/UNIX, MS Windows and Mac OS X.