nanoCAD is a professional and simple CAD software, with full *.dwg support. Developed by Nanosoft
License: Freemium
Apps available for Windows
SketchUp (formerly Google Sketchup) is a 3D modeling software. Developed by Trimble
Apps available for Mac OS X Windows Online
nanoCAD is primarily focused on 2D drafting and basic 3D modeling, making it suitable for engineering and architectural drafting. In contrast, Sketchup excels in 3D modeling and visualization, offering extensive tools for architects and designers.