You can create Gantt charts on the wiki using an XML based project plan description. Instructions are here: http://www.logilab.org/projects/pygantt/documentation
<project xmlns:pg="http://www.logilab.org/namespaces/pygantt_docbook" id="myprojet"> <label>Cytoscape</label> <task id="module"> <label>Cytoscape v2.2</label> <task id="codeFreeze2.2"> <label>Code freeze</label> <duration unit=weeks>4</duration> <constraint type=begin-at-date>2005/08/15</constraint> </task> </task> </project>