“Someone who’s brand new and doesn’t know how to work in 3D can start with this stuff and learn how to assemble things,' Christian Pramuk, 123D's apps product manager at Autodesk, told Mashable. Unlike other more complex design apps, 123D Design uses natural interactions for creating and editing, making the process simple for beginners who might not understand complex CAD concepts. It helps users quickly and easily create 3D models that they can then print. $1295DOWNLOADĪutodesk released 123D Design, a free 3D-modeling tool, on Thursday.