diff --git a/doc/deriv.xml b/doc/deriv.xml
index c1574bf..f4a1c50 100644
--- a/doc/deriv.xml
+++ b/doc/deriv.xml
@@ -4,14 +4,17 @@
 Here are other programs or efforts that build on UMLGraph's
 code or ideas.
 <ul>
-<li> <a href="http://lightuml.sourceforge.net/">LightUML</a>
-integrates UMLGraph into <a href="http://www.eclipse.org">Eclipse</a>.</li>
 <li> <a href="http://maven-plugins.sourceforge.net/maven-dotuml-plugin/">Dotuml</a>
 integrates UMLGraph into <a href="http://maven.apache.org/">Maven</a>.</li>
 <li> The <a href="http://www.primordion.com/Xholon/index.html">Xholon</a>
 framework for building loosely-organized systems
 captures object interactions at runtime,
 and creates UML 2.0 sequence diagrams using UMLGraph.</li>
+<li> <a href="http://phpcallgraph.sourceforge.net/">phpCallGraph</a>
+can output its analysis in UMLGraph format, allowing the
+automatic production of UML sequence diagrams from PHP code.</li>
+<li> <a href="http://lightuml.sourceforge.net/">LightUML</a>
+integrates UMLGraph into <a href="http://www.eclipse.org">Eclipse</a>.</li>
 <li> <a href="http://ruby-uml.rubyforge.org/">ruby-uml</a>
 traces aspects of an application
 using UMLGraph to generate sequence and class diagrams.</li>