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<title>Recommended copyleft licenses Copyleft Licenses
- GNU Project - Free Software Foundation</title>
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<h2>Recommended copyleft licenses</h2>
<!--#include virtual="/licenses/fsf-licensing.html" --> Copyleft Licenses</h2>
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<p>This page lists the copyleft licenses that we recommend free
  software projects and associated documentation use.</p>

<h3 id="software">Software licenses</h3>

<ul>
<li>The <a href="/licenses/gpl.html">GNU General Public License,
    version 3</a> or any later version</li>
<li>The <a href="/licenses/agpl.html">GNU Affero General Public
    License, version 3</a> or any later version</li>
</ul>

<h3 id="documentation">Documentation licenses</h3>

<ul>
<li>The <a href="/licenses/fdl.html">GNU Free Documentation License,
    version 1.3</a> or any later version</li>
</ul>

<p>To learn more about when and why we recommend these licenses,
  please see <a href="/licenses/license-recommendations.html">How to
  choose a license for your own work</a>.  Note that <strong>only the
  licenses listed above are recommended copyleft
  licenses</strong>; other licenses discussed in that guide are
  not copyleft licenses, or else suggested for use in more narrow
  circumstances.</p>

<p><a href="/licenses/">Back to the GNU licenses page</a></p>

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<p class="unprintable">Updated:
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$Date: 2022/03/03 17:31:43 $
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