Make 3D CAD, CAx, MCAD, CAE and PLM models with FreeCAD
Portable FreeCAD is a portable, free and powerful editor that for 3D CAD, CAx, MCAD, CAE and PLM models, featuring a pleasant and easy to use interface.
The program lets you import from Mesh, Point, Python, OpenSCAD or STEP). You can save your work as PDF files.
A great feature of FreeCAD is the support of macros that would simplify your work. The interface is highly customizable, including the change of language. If you are in search of a CAD editor, have a look on that; nothing to lose!