OAOD (LibreCAD)
Application: LibreCAD
What it is:
LibreCAD is a feature-packed and mature 2D-CAD application with some
really great advantages.
Features:
* It’s free – no worry about license costs or annual fees.
* No language barriers – it’s available in a large number of
languages, with more being added continually.
* GPLv2 public license – you can use it, customize it, hack it and
copy it with free user support and developer support from our active
worldwide community and ou experienced developer team.
* LibreCAD is an Open Source community-driven project: development
is open to new talent and new ideas, and our software is tested and
used daily by a large and devoted user community; you, too, can get
involved and influence its future development.
To know more about:
http://librecad.org/cms/home.html
To install in Ubuntu:
http://librecad.org/cms/render/live/home/installation/linux.html