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     <li><a href="https://crypt.ee/">Cryptee</a> - Free privacy-friendly service for storing Documents, files and Photos</li>
     <li><a href="https://ethercalc.net/">EtherCalc</a> - EtherCalc is a web spreadsheet. Data is saved on the web, and people can edit the same document at the same time. Changes are instantly reflected on all screens. Work together on inventories, survey forms, list management, brainstorming sessions.</li>
     <li><a href="https://disroot.org/">disroot.org</a> - Free privacy-friendly service that offers Etherpad, EtherCalc and PrivateBin.</li>
-    <li><a href="https://dudle.inf.tu-dresden.de/privacy/">dudle</a> - An online scheduling application, which is free and OpenSource. Schedule meetings or make small online polls. No email collection or the need of registration.</li>
+    <li><a href="https://dudle.inf.tu-dresden.de/anonymous/">dudle</a> - An online scheduling application, which is free and OpenSource. Schedule meetings or make small online polls. No email collection or the need of registration.</li>
     <li><a href="https://www.libreoffice.org/">LibreOffice</a> - Free and open source office suite</li>
   </ul>
   <h1 id="os" class="anchor"><a href="#os"><i class="fas fa-link anchor-icon"></i></a> PC Operating Systems</h1>