For many electronics students and engineers working on PCB design, CadSoft Computer's EAGLE PCB design software is a very familiar name. EAGLE has become a best-selling product of its kind since the 1990s. Nowadays, more and more PCB designers are turning to use EAGLE for circuit design.

AutoCAD is undoubtedly the most popular and powerful CAD modeling software. But as a commercial software, it is really, really expensive. FreeCAD is a free, open-source, cross-platform and general-purpose 3D CAx (CAD, CAM, CAE), PLM modeling tool specially designed for home user/hobbyist, experienced CAD user, programmer or educator.