<p>Yaffs is available under the GPL licence and under commercial terms.</p><p>For testing and experiment you can grab Yaffs under the GPL free of charge right now&nbsp;<strong><a href="/download-yaffs-using-git">from our GIT repository</a></strong>.</p><p>If you distribute a product using this version of Yaffs, you must release all your linked source code in accordance with the&nbsp;<a href="http://www.gnu.org/licenses/gpl-2.0.html">GPL</a>. Alternatively if you do not wish to disclose your Source Code, commercial licences are available.</p><p>Commercial Yaffs licences are non-exclusive, perpetual, world-wide, royalty-free and paid for with a single fee for one product. A commercial licence entitles you to most further development and improvement of the Yaffs code.</p><p>You can find further information about each licence in these documents:</p><ul><li><a href="yaffs-gpl">Yaffs under GPL</a></li><li><a href="yaffs-licence-faqs">Yaffs licensing FAQ&nbsp;</a></li></ul>