TekyMeky FreeCAD - 2D 3D CAD - Uses AutoCAD DWG File - Computer Aided Design Software DVD  (1, 1 PC)

FreeCAD is a open-source (under the LGPLv2+ license) general-purpose parametric 3D CAD modeler and a building information modeling (BIM) software with finite-element-method (FEM) support. FreeCAD is intended for mechanical engineering product design but also expands to a wider range of uses around engineering, such as architecture or electrical engineering. Users can not only interact with this software, users can also extend the functionality of the software using the Python programming language.