The TraceTracker BI Platform supports several types of reports: Pentaho Reports (formely known as JFreeReport), JasperReports and BIRT. Even though all these report frameworks are supported, it is strongly recommended to use Pentaho Reports. The most obvious reason is of course that this framework will be able to take advantage of the entire Pentaho BI Suite (Pentaho Data Integration, Pentaho Analysis (Mondrian OLAP), etc). Also TraceTracker will not be able to support development of reports developed in JasperReports or BIRT!