This page says it's GPL https://launchpad.net/trinity-desktop
This one [http://www.trinitydesktop.org/] says it's free software.The Contributors tab at the second website lists some mirrors. If you dig down in the first mirror (and probably the others) there are sources:
http://www.mirrorservice.org/sites/trinitydesktop.org/trinity/ http://www.mirrorservice.org/sites/trinitydesktop.org/trinity/trinity-builddeps-v3.5.13/debian/dists/lenny/main/source/ Is that enough to make it free?
