On Tue, Jun 2, 2009 at 7:49 AM, Joshua Zeidner <jjzeidner@gmail.com> wrote:

just to clarify, Im talking about physical architecture and design.

I did look at qCad, but I don't think it is strictly open source.

-jmz

Is VirtualBox OSS? Scalix? Zimbra?

Qcad community edition is listed as OSS on their website, it's released under the GPL and is in the FSF's (who is usually VERY picky) software database.
http://directory.fsf.org/project/QCad/
http://www.ribbonsoft.com/qcad_doc_faq.html#34
http://www.ribbonsoft.com/forum/viewtopic.php?t=745&sid=e3fbec71952606fac9fd9e919c98a7c3

Many software offer community editions and enterprise editions (even to a lesser extent, RHEL vs. CentOS/Fedora -- just a discussion, I know that CentOS is not strictly involved with RHEL and that Fed is just RHEL testing grounds but, w/e). It's pretty much up to you what your definition of Free or Open Source is...