Copyright holders of creative work can unilaterally implement these licenses

for their own works to build communities that collaboratively share and

improve those copylefted creative works.

## What is copyleft.org?

copyleft.org is a collaborative project to create and disseminate useful

information, tutorial material, and new policy ideas regarding all forms of

copyleft licensing.

This site itself is licensed under a copyleft license, and has received

contributions from experts around the world.  Thus, copyleft.org is the

premier "meta-project" of copyleft: it's useful copylefted information all

about copyleft itself!

### The Copyleft Guide and Tutorial

The primary project currently on this site is a tutorial book entitled

[*Copyleft and the GNU General Public License: A Comprehensive Tutorial and Guide*](/guide/).

This guide describes the policy motivations for copyleft, presents a detailed analysis of the text of

various copyleft licenses, and gives examples and case studies of copyleft compliance situations.

### Getting Involved

There are various ways to get involved with this project.  The primary

copyleft.org website is a wiki, and we welcome helpful edits and additions.

For the aforementioned guide and tutorial about GPL and other copyleft concepts,

we seek help in the following ways:

#### Proposing Improvements to the Guide

to the Guide are most welcome. If you're looking for something to fix, just

grep the *.tex files for "FIXME" and you'll find plenty.  Many of them are

simple and easy to do.  Some of them are writing, and some of them are

formatting-related.

#### Joining Mailing Lists

   * Subscribe to our low-traffic [announcements-only mailing list](https://lists.copyleft.org/cgi-bin/mailman/listinfo/announce).

   * Join discussion on our [primary mailing list, called "discuss"](https://lists.copyleft.org/cgi-bin/mailman/listinfo/discuss).

#### IRC Discussion

The copyleft.org

[IRC channel is #copyleft on irc.freenode.net](irc://irc.freenode.net/#copyleft).

The [IRC logs are public here on this site](/irclogs/).

### Who Contributes to copyleft.org?

This site is a joint project of

[Software Freedom Conservancy](https://sfconservancy.org/news/2014/nov/07/copyleft-org/) and the

[Free Software Foundation](http://www.fsf.org/news/software-freedom-conservancy-and-free-software-foundation-announce-copyleft.org).  The editor-in-chief of

[the guide](/guide/) is [Bradley M. Kuhn](http://ebb.org/bkuhn).  The

[recent changes page](/recentchanges) shows who has

contributed to the wiki, and you can see the

[Git commit log on the tutorial](https://k.copyleft.org/guide/changelog)

to see who has contributed to it, and

[[see the list of users who contribute to this Wiki|users]].

### URLs You Can Memorize!

copyleft.org has many easy-to-remember URLs.  These are convenience URLs that

you can memorize and give to people verbally to point them to the right part