MegaCAD 2D/3D is described as 'MegaCAD 3D is the ideal synthesis of an innovative solid and surface modeling system and a full-feature 2D drafting program. If you are developing your model in 3D or if you are drawing a 2D design, each step will automatically be transferred from one dimension into the other' and is a CAD software in the photos & graphics category. There are more than 50 alternatives to MegaCAD 2D/3D for a variety of platforms, including Windows, Mac, Linux, Web-based and BSD apps. The best MegaCAD 2D/3D alternative is FreeCAD, which is both free and Open Source. Other great apps like MegaCAD 2D/3D are SketchUp, LibreCAD, Autodesk AutoCAD and SOLIDWORKS.