Inventor is the go to program for 3D parametric modeling of mechanical parts. Inventor has a vast array of tools that can model parts, combine multiple parts in an assembly, create part motion in assemblies, create 2D drawings based on 3D models that are compatible with AutoCAD, create exploded part diagrams, model stress and strain on parts, and so much more. There are even sheet metal design templates that can create 3D sheet metal items from scratch, or a flat pattern that can outline the 3D model on a flat stock of sheet metal. Inventor also has a freeform tool, that allows for very precise modeling of complex shapes and designs. With this program, there are no bounds except for the users’ imagination.