A reverse engineering, metamodel driven tool that scans PHP files and directories, and delivers an UML/XMI representation of the classes / packages found. The XMI code that it generates can be imported into any UML modeling tool. It is available on PEAR.
The Nereu is capable to make the requirements rastreability matrix showing the impact of requirements alterations on software project. It becomes an inestimable auxiliar tool to the requirements management, an important phase in software process.