ECO is the core engine for all MDriven applications. Given a UML model and a Persistence Mapper, ECO will help any .net application handle the objects of that model in memory. It will, via the Persistence Mapper, help dehydrate or hydrate objects from persistent storage, i.e. a database.

ECO is also the name of a Visual Studio Plugin that brings ECO, Modlr, Derived Code, Derived DB scripts, and Database Evolution to Visual Studio.