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.
- djgpp: DJGPP-based version of TeX for MS-DOS
- metapost: A development of METAFONT for creating graphics
- xfig: XWindows vector drawing program
- graphtex: Graphs theory and related diagrams in a TeX document