Creo is a family or suite of design software supporting product design for discrete manufacturers. Developed by PTC - Parametric Technology Corporation
License: Commercial
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, highly customizable modeling tool favored by users needing advanced geometry editing capabilities, while PTC Creo is a commercial software known for its user-friendly interface and robust parametric modeling suited for various industries.