QCAD is a free computer-aided design (CAD) software for 2D design and drafting. Developed by RibbonSoft
License: Free Personal
Apps available for Mac OS X Windows Linux
AutoCAD is a commercial computer-aided design (CAD) and drafting software application. Developed and marketed by Autodesk. Developed by Autodesk Inc.
License: Commercial
Apps available for Mac OS X Windows Online Android iPhone