LibreCAD - кросс-платформенная (Windows, Linux, Mac) система для автоматизации проектирования в 2D режиме, которое доступно более чем на 20 языках, включая русский. Написана она с использованием библиотеки Qt4. Проект ранее назывался CADuntu. Может служить некой альтернативой коммерческому AutoCAD.

LibreCAD is a feature-packed and mature 2D-CAD application with some really great advantages:

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.

ОС: Windows 2003, Windows XP, Windows Vista, and Windows 7 (32 and 64-bit).