LibreCAD is a fully comprehensive 2D CAD application that you can download and install for free. There is a large base of satisfied LibreCAD users worldwide, and it is available in more than 20 languages and for all major operating systems, including Microsoft Windows, Mac OS X and Linux, including Debian, Ubuntu, Fedora, Mandriva, Suse, etc.
- 2D CAD software
Anything later than 1.0.1 doesn't work with OSX 10.6.8 - you need to upgrade to at least Mountain Lion (10.8). Annoying for those of us still happy with 10.6.8