BRL-CAD is a constructive solid geometry (CSG) solid modeling computer-aided design (CAD) system. It includes an interactive geometry editor, ray tracing support for graphics rendering and geometric analysis, computer network distributed framebuffer support, scripting, image-processing and signal-processing tools. Developed by U.S. Army Research Laboratory
License: Open Source
BRL-CAD is an open-source CAD software that excels in 3D modeling and simulation, making it ideal for engineering and scientific applications, but it has a steeper learning curve. In contrast, progeCAD Smart offers a more user-friendly experience with strong 2D drafting and collaboration tools, making it well-suited for architectural projects, though it has limitations in advanced 3D capabilities.