What is copyleft.org?

copyleft.org is a defunct collaborative project to create and disseminate useful information, tutorial material, and new policy ideas regarding all forms of copyleft licensing.

The Copyleft Guide and Tutorial

The tutorial book entitled [copyleft and the GNU General Public License: A Comprehensive Tutorial and Guide] is still provided on this site. However, this document is made public for archival and historical purposes only. Not all of the information is current, and accuracy cannot be guaranteed.