various copyleft licenses, and gives examples and case studies of copyleft

compliance situations.

### The Copyleft Guide and Tutorial

The primary project currently on this site is the

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

### Getting Involved

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

copyleft.org website is a wiki, and we welcome additional information.

Please edit this wiki with more information about copyleft.

However, the primary project available on this site is the aforementioned

guide and tutorial about GPL and other copyleft concepts.  We seek

contributors.

### Who Contributes to copyleft.org?

This site is a joint project of

[Software Freedom Conservancy](https://sfconservancy.org) and

[the Free Software Foundation](https://fsf.org).  The editor-in-chief of

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

contributed to the wiki, and you can see the

[Git commit log on the tutorial](https://gitorious.org/copyleft-org/tutorial/commits/)

to see who has contributed to it.

### Offsite Resources

#### 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)

* it'd be nice to prominently link to pdf or other single-page version of the guide so that those who prefer scrolling rather than clicking through long-form documents and in-browser searching whole long-form document are satisfied

* it'd be nice to link to template and wiki sources (or maybe they are all in one repo; I don't know ikiwiki well)

* by-sa license icon cries out for more branding! FSF and Consevancy logos in footer, maybe right aligned?

* something odd about /about /about/about /about/colophon links (and seem not present now)

* /guide/ link to gitorious is broken due to rename

* no history link for each page (usually by recent changes, etc) loses major wiki affordance, cf <https://ikiwiki.info/users/joey/> ... looks to require [configuration](https://ikiwiki.info/pagehistory/)

* no diff link in rcentchanges loses major wiki affordance, cf <https://ikiwiki.info/recentchanges/> ... looks to require [plugin](https://ikiwiki.info/plugins/recentchangesdiff/)

* "This Page's Discussion" link obtains "Error: bad page name".

* look into lstlisting to see if we can do code highlighting or otherwise

  better presentation of it in HTML.

---

Hopeless Issues:

* copyleft.org logo clipped by a few pixels on the right in Firefox, but goes away at certain magnifications, not present in Chromium. Seems related to svg. Getting rid of the svg and just always displaying bitmap fixes.

   * I think the above was merely a width/height setting issue, which appears fixed now.  Can you confirm?

      * It isn't fixed. Seems Firefox has some long term problems with unwanted SVG [clipping](https://bugzilla.mozilla.org/show_bug.cgi?id=1056949). I will try to reproduce and file.

      * I gave up and did this.  I don't get why <svg> doesn't work.  WTF?

        It worked in every browser I tested.

---

I think this is a WONT_FIX:

   * I'm going to ask Karen what she thinks about this.  I don't really care,

     and wonder if it's better that way for branding.  I'll leave it as is

     for now.

      * Make sure you look on a small screen device.