FreeCAD
Build parametric 3D models with sketches, constraints, and specialized design workbenches.GetLGPL-2.1
Design precise 3D objects by writing code that describes their geometry.
GPL-2.0 · Downloads from openscad.org
OpenSCAD turns a text description of shapes and operations into a 3D model. Parameters make it straightforward to vary dimensions and regenerate related designs.
It is useful for mechanical parts and repeatable designs, especially when exact relationships matter more than sculpting by hand.
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