In order to enable architects to evaluate architectural design comprehensively in the three-dimensional virtual building models, GRAPHISOFT company from Hungary specially designed ARCHICAD this new generation of BIM software. It was proved by users around the world to be a tool can be trusted completely for architects, designers, engineers and builders to design and construct the great buildings.
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.