DraftSight is a professional-grade 2D design and drafting solution. Developed by Dassault Systèmes SolidWorks Corp.
License: Freemium
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 a powerful open-source software primarily focused on 3D modeling and rendering, making it ideal for advanced users and those who need extensive customization. In contrast, DraftSight offers a more user-friendly experience for 2D drafting and collaboration, making it suitable for teams and users looking for ease of use.