Free

   In our community, as well as in the wider tech and some non-tech
   communities, the word free is normally used in the sense of [1]free as in
   freedom, i.e. implying freedom, not price. The word for "free of cost" is
   [2]gratis (also free as in beer). To prevent this confusion the word
   [3]libre is sometimes used in place of free, or we say free as in freedom,
   free as in speech etc.

Links:
1. free_software.md
2. gratis.md
3. libre.md