FreeCAD / FreeCAD

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

OrcaSlicer / OrcaSlicer

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

zeux / meshoptimizer

Mesh optimization library that makes meshes smaller and faster to render