OpenSCAD

The Programmers Solid 3D CAD Modeller

OpenSCAD Chat: #openscad (on IRC network libera.chat)
OpenSCAD on Mastodon
Share customizable designs: 3dcustomizer.net
OpenSCAD Tutorial on Wikibooks
Find OpenSCAD Designs on Printables and Thingiverse
OpenSCAD Chat: #openscad (on IRC network libera.chat)

OpenSCAD is software for creating solid 3D CAD objects.

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