Looking for linux compatible quantity take off application

[3pinner]

I am looking for a linux compatible preferably open source application to do quantity take offs from construction plans. Seems I'll be doing a lot of them from now on, and I really don't want to go back to Microsoft to do this.
Any suggestions?
Thanks

[praseodym]

CAD? Check one of these links

http://wiki.ubuntuusers.de/CAD?highlight=technische%20zeichnung

Salome is the most powerful

[tgalati4]

How do you perform this task currently? What format are your plans? If you can output to an xml (text file with tags) file, then you could write a script to go through the file and generate a materials schedule.