--- a/relatedprojects.xml
+++ b/relatedprojects.xml
@@ -114,6 +114,13 @@
 </div>
 
 <div class="catit">
+    <h3><a href="http://www.geogebra.org/trac/wiki/GeoGebraCAS/Documentation">GeoGebraCAS</a></h3>
+    <p>Developer: Markus Hohenwarter et al.</p>
+    <p>“GeoGebra is free and multi-platform dynamic mathematics software for all levels of education that joins geometry, algebra, tables, graphing, statistics and calculus in one easy-to-use package. GeoGebraCAS extends the Computer Algebra System (CAS) features of GeoGebra to allow students to work with fractions, equations, and formulas that include variables.”</p>
+    <p class="url">→ <a href="http://www.geogebra.org/trac/wiki/GeoGebraCAS/Documentation">http://www.geogebra.org/trac/wiki/GeoGebraCAS/Documentation</a></p>
+</div>
+
+<div class="catit">
     <h3><a href="http://www.lon-capa.org/">The LearningOnline Network with CAPA</a></h3>
     <p>Developer: Gerd Kortemeyer.</p>
     <p>“Sharing and using online learning and assessment materials across institutions and disciplines.”</p>