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BRL-CAD

BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for robust geometric representation, with more than 20 years of active development.

Antimony

Antimony

Antimony is a computer-aided design (CAD) tool from a parallel universe in which CAD software evolved from Lisp machines rathe ...