Name: BRL-CAD
Homepage: http://brlcad.org/
Open Source: yes
Source: https://sourceforge.net/projects/brlcad/files/BRL-CAD%20for%20Linux/
https://sourceforge.net/projects/brlcad/files/BRL-CAD%20Source/
https://sourceforge.net/projects/brlcad/files/latest/download?source=files
Description: "BRL-CAD is a powerful open source cross-platform solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, a system performance analysis benchmark suite, geometry libraries for application developers, and more than 30 years of active development."