nanoCAD is described as 'Pro-grade 2D CAD system with native DWG support and full customizability. It is totally free, for business, professional, or personal purposes. It is fast, lightweight, capable, and , unlike most free CAD programs, completely uncrippled. nanoCAD includes:' and is a CAD software in the photos & graphics category. There are more than 50 alternatives to nanoCAD for a variety of platforms, including Windows, Mac, Linux, Web-based and iPad apps. The best nanoCAD alternative is FreeCAD, which is both free and Open Source. Other great apps like nanoCAD are LibreCAD, Autodesk AutoCAD, SOLIDWORKS and Dune 3D.
Asset forge just generate low-poly models from predesigned parts.