strong>You cannot sell any software including some code licensed under a free license</strong>.</p>
<h2 id="more">More</h2>
<p>More info is available at the <a href="http://www.fsf.org">Free Software Foundation</a>. A copy of the license is included in this document, <a href="gnu-gpl.html">here</a>.</p>
<p>All the contributors of Duik, friends, and all the people who helped the creation of Duik are listed <a href="credits.html">here</a>. <strong>You may thank all of them for their commitment to greatly impr