"FREE 2D/3D CAD on Windows and Linux: MEDUSA4 Personal Latest Release in Time for the Holidays
MEDUSA4 Personal 3.1: Now with the MEDUSA4 Smart Drafting Tool - The New Way to Create Geometry"
http://www.cad-schroer.com/index2.php?&land=com&ziel=Start&thema=mask1.php&id=959%20&scr=1.3
"MEDUSA4 Personal is expressly restricted to non-commercial use. Small technical differences from the commercial version include a different sheet format, watermarked print output, and the ability to import from, but not export to, DXF/DWG format. The commercial version is highly customisable, while MEDUSA4 Personal is not."
Also, each download is tied to a physical address:
"Example: 00-01-02-FB-60-18 or 000102FB6018
Windows: use a dos-box and run ipconfig /all
Linux: use a terminal window and run ifconfig -a
You must provide a valid physical address in order for the software to install and run on your machine.
We use this address to issue a software license file (keyfile), which allows the downloaded software to work and is locked to your specific machine.
By registering you will also automatically receive any MEDUSA4 Personal updates issued."
Make sure that when using Opera (possibly with Firefox this may be a problem, too) CLOSE your facebook or other logged-in personal sites. For some reason, saving the
medusa4 personal CAD Schroer Online - Support
palette as a pdf caused it to use my facebook profile URL... strange...