FreeCAD -

In our opinion - the best one resource of free LISP programs with highest quality for a variety of purposes
Designed for AutoCAD and "AutoCAD Like" systems such as ZWCAD, IntelliCAD ...

If you need to cut or shear chipboard, steel sheets or profiles, polycarbonate sheets, glass panels or other bar or panel material and you need to save a lot of time and money, use program OPTIMIK^®.

The program PARTS can generate views of more than 250 kinds of mechanical engineering parts or profiles according CSN and 130 according DIN.

The database of standards was made from accessible CSN standards.
Din standards are according “DIN TASHENBUCH - Mechanische Verbindungselemente 1-4”

Compose floor area summary, Create room labels, Mesure length total of selected objects, Draw black iron pipes, Draw copper pipes, Draw doors, Draw windows, Remove MText formatting, Draw steel angles, ...