copyleft.org
============

This site is a wiki for dissemination of information of all things related to
copyleft licensing.  The primary project currently on this site is the
[tutorial book entitled *Copyleft and the GNU General Public License: A Comprehensive Tutorial*](/guide/).

## What Is Copyleft?

Here are a few sources to read generally what copyleft is:

  * [Richard M. Stallman's essay on copyleft at gnu.org](https://www.gnu.org/copyleft/)
  * [The Wikipedia entry on Copyleft](http://en.wikipedia.org/wiki/Copyleft)