Free Software is a difficult subject, some people agree with RMS's definition of FreeSoftware, others take a more pragmatic view.
However I think we should try the OpenSourceInitiative's definition, which is available here: 
http://www.opensource.org/
If you would like to find out more about free software, you probably want to read the Free Software Definition at the Free Software Foundation.
37 pages link to FreeSoftware:
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