> You might be interested to learn that out of your list (vi, Python, mySQL, Postgres, sed, and awk), only MySQL is released under a free software license (GPL)

> You might be interested to learn that out of your list (vi, Python, mySQL, Postgres, sed, and awk), only MySQL is released under a free software license (GPL). The others are released under BSD or BSD-like licenses. The BSD license (and "BSD-like" licenses) are free software licenses. "Free" does not mean "copyleft". http://www.gnu.org/licenses/license-list.html http://www.gnu.org/licenses/license-list.html