cool. i didn't know about the structural designing tools.
what did you mean by 3D "sketching"?
thanks for sharing all those apps. by the way, just to add - there are Windows installers for all of them. so it is easy to try it out for windows users, which i think must be a lot in the field of arch. :)
i read qcad's community edition is open source, and has some limitations compared to the full, commercial version. i couldn't find the link to download the community edition..
anyway there's freecad ;-)
well yorik you are really a motivation! :-)
all the best!
Qcad has two licenses, open-source and commercial. The main difference between both is that the OS version has no polylines (they are made of single lines). By 3d sketching, I mean quick modeling, without much precision, like you do with sketchup...
I also forgot to mention alchemy, very cool for generatign abstract shapes (exportable to svg, therefore usable in cad)
And this is a very interesting project of a linux distribution specially made for architects: http://www.openarchitect.org/ (only in french I'm afraid)