that have source code available?
and follow good EMF recommended design principles.
There are dozens, if not hundreds, of other open source projects with source code available that rely on EMF. One of my projects, IAML, is one of them.
Mule uses it for their Mule IDE product: http://www.mulesoft.org/documentation/display/MULEIDE/Home
Source code here: http://svn.muleforge.org/mule-ide/trunk/src/main/