Package: Qcad
In Debian: yes
Web: http://www.qcad.org
Description
Qcad is a professional CAD System, compatible with Autocad file format even if it has less features.
Links
Short presentation (in French) http://logiciels-libres-cndp.ac-versailles.fr/article.php3?id_article=74
Large ressources about technical drawing with linux : http://www.linuxgraphic.org/section2d/qcad/index.html (in French).