I think you were on the right track with "free software", but think rather "public domain".
The notion of, "this thing I have created is freely available to every member of the public forever", is important.
For one thing, it stops information from getting lost, as used to happen with trade secrets and now happens with, 'nobody can use it because nobody knows who had the copyright and the companies involved folded 20 years ago'*.
Public domain stops us from having to reinvent the wheel ever again.
* The TPP's extending copyright to 'the end of time or thereabouts' will undoubtedly be an unqualified boon to all humanity. /sarcasm