Cycas - free drafting software

Update (Jan 2012): I would now recommend Google Sketchup software.

After some research of Linux-compatible free drafting software, I eventually settled on Cycas (http://www.cycas.de/). There is some learning curve, but after a couple of hours, it became fairly easy to use. There is also a large amount of documentation and tutorials available with the program, even if the below par German-English translation makes it hard to understand (most learning came by just messing around with the software).

I plan to use Cycas to draw floorplans, and may try and use some of the more advanced features such as 3D povray rendering from any perspective inside the basement (the Cycas gallery is impressive).

Here is my first attempt at the basement floorplan (red represents wood studs, white walls are concrete).