CAD
OpenSCAD
SolveSpace
FreeCAD
https://github.com/dune3d/dune3d
(used by azonenberg)
LEAP71
https://github.com/leap71/LEAP71_ShapeKernel/blob/main/Documentation/README-ReadingDetails.md
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Antimony https://www.mattkeeter.com/projects/antimony/3/
no longer in active development.