CADuntu is a 2D CAD drawing tool based on the community edition of QCad ported to Qt4 and works natively on OSX, Windows and Linux.
Starting today, CADuntu has a new name: LibreCAD and it can easily be installed in Ubuntu, getting a PPA for Lucid, Maverick and Natty. Even though LibreCAD is quite new (and still in beta), it is already available in several languages and gives a real GPL solution to read/modify/create CAD files.
Install LibreCAD in Ubuntu:
For Ubuntu 10.04:
For Ubuntu 10.10:
sudo add-apt-repository ppa:showard314/librecad sudo apt-get update sudo apt-get install librecad
sudo add-apt-repository ppa:showard314/ppa sudo apt-get update sudo apt-get install librecad
For Ubuntu 11.04+, LibreCAD is available in the official repositories so search for it in the Ubuntu Software Center.
The application will show up as "CADuntu" in the menu but that should change soon.
Download LibreCAD for Mac OSX and Windows.
See also: Bricscad: .dwg Based CAD Software Is Now Available For Linux