CadStd (CAD Standard) Lite is a functionally limited but completely free version (also for commercial use) of CadStd Pro. The program allows you to create simple architectural, mechanical, schematic, etc. designs.

All the basic tools for creating geometric shapes, lines and curves, etc. are at the user's disposal. Individual objects can be rotated, mirrored, cropped, simplified and scaled.

CadStd Lite allows you to export to HPGL/1 (Hewlett Packard Graphic Language) and DXF (used by AutoCAD) formats. It also has its own file format.