Along with my professional activities, I participate in the PHP open-source framework PEAR. I am the lead developer of the package PHP_UML, which focuses on UML and its XML representation (XMI).
PHP_UML can perform reverse code engineering, generate automatic API documentation, and convert some XMI formats between them.
It is an ambitious software, useful for everyone who practices object modeling.
In 2007, as part of my work at the Institut Curie, I also developed an ORM, Dorm, which incorporates some of the principles of the Hibernate Java framework. Given the dynamism of other similar open source projects (such as Doctrine), I have abandoned that project.