BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
daitrix is a secure os built on security, ease of use, and linux/unix based. verry fast to install with 4 setup types- dev, server, desktop and all. everything a normal linux distro has and then some.