Autodesk AutoCAD is described as 'Versatile CAD software offering 2D and 3D modeling, visualization, and cloud access for architectural and engineering design professionals' and is a very popular CAD software in the photos & graphics category. There are more than 100 alternatives to Autodesk AutoCAD for a variety of platforms, including Windows, Mac, Linux, Web-based and iPad apps. The best Autodesk AutoCAD alternative is LibreCAD, which is both free and Open Source. Other great apps like Autodesk AutoCAD are DraftSight, FreeCAD, BricsCAD and CMS IntelliCAD.