If you are a Set Designer you know how expensive it is to buy a new copy of AutoCAD or VectorWorks. I was dejectedly staring at prices online the other day and typed in free cad program to Google, and up popped LibreCAD. The program is entirely free (although they do ask for donations if you can afford it) and can be downloaded for OSX, Linux or Windows. I am always up for trying out something new and this program seems to be legitimate. Check it out for yourself at: http://librecad.org/cms/home/features.html .