DraftSight is a professional-grade 2D design and drafting solution.

BricsCAD is a software application for computer-aided design (CAD).

QCAD is a free computer-aided design (CAD) software for 2D design and drafting.

BRL-CAD is a constructive solid geometry (CSG) solid modeling computer-aided design (CAD) system. It includes an interactive geometry editor, ray tracing supp…

SymPy is a Python library for symbolic computation. It provides computer algebra capabilities either as a standalone application, as a library to other applic…