G-code generator for 3D printers (Bambu, Prusa, Voron, VzBot, RatRig, Creality, etc.)

Experimental attempt for the next generation assembly workbench for FreeCAD

Constraint-based geometry sketcher for blender

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

3D printer / slicing GUI built on top of the Uranium framework

This is optimized firmware for Ender3 V2/S1 3D printers.

QCAD - The Open Source 2D CAD. QCAD is a cross-platform CAD solution for Windows, macOS and Linux. It supports the DXF format and optionally the DWG format (through a proprietary plugin).