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. However, this document is made public for archival and historical purposes only. Not all of the information is current, and accuracy cannot be guaranteed.