Aqui ficam alguns exemplos presentes nestas páginas....
Linux Alternative Project (formally the Linux Equivalent
e claro não poderia faltar o site que mais exemplos possui sobre este tipo de software:
CAD software for Linux
Em relação ao CAD Cá ficam os exemplos dados pelo OSALT:
QCad Community Edition 220.127.116.11
Available for: windows mac linux unix java QCad
Community Edition is an open source edition of RibbonSoft's CAD system.
QCad is a 2D CAD application that aims at being simple enough foranyone to use - even users with no previous CAD... Read more
Available for: windows mac linux unix java BRL-CAD
is an open source cad systems based around constructive solid geometry (csg) modeling. On top of all of it's modeling features, such as the interactive geometry editor, BRL-CAD offers... Read more
Available for: windows mac linux unix java Archimedes
is a computer aided design (CAD) solution focusing on architectural design. While the current version of Archimedes may not be mature enough for all - this project is very promising. It... Read more