EMF Views
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.
NeoEMF
NeoEMF is a project that aims at handling large EMF models in an efficient and scalable way.
VeriATL
Fine-Grained Incrementality for Deductive Verification of Model Transformations (Online)