latexcad – A CAD drawing package
The LaTeX Project Public License
graphics generator whose output is good for use with TeX
Maybe you are interested in the following packages as well.
- metapost: A development of METAFONT for creating graphics
- texas: 32-bit TeX 3.14 compiled for MS-DOS 386/486 computers
- graphtex: Graphs theory and related diagrams in a TeX document
- texsketch: A drawing package for OS/2