The “EMFStore” was designed as part of the Unicase project, a unified CASE tool. The underlying idea of Unicase is to create one integrated user interface for different types of software development artifacts such as UML models, tasks or requirements and to allow creating relations between them. These artifacts are stored in a central repository, the EMFStore. The EMFStore provides a server, which is capable of storing instances of EMF models and enables users to collaborate on them. We will show in detail how the open-source tool Unicase builds upon this server, but the EMFStore is capable of storing arbitrary instances of EMF models. Therefore, as a first step in the Unicase project, we plan to contribute the EMFStore under EPL. We are interested in opinions and looking for partners.