The project is called Re-App. Main site: reapp-projekt.de, link to a page about the Re-App Workbench which is one of the places where the ontologies get used.
It’s all in German though unfortunately (but it’s a German national project, so I guess that is to be expected).
The Workbench is going to be released at some point in the future, if I understood the project partners that I’ve talked to correctly.