EMF Views is an Eclipse plugin that brings the concept of database views to the modeling world

JTL

JTL is an EMF-based tool that allows you to design and manipulate models, maintain consistency and synchronize software artifacts, keep traceability during design.

Constellation organizes and manages collaborative (distributed) World Wide Modeling projects,

NeoEMF is a project that aims at handling large EMF models in an efficient and scalable way.