Eclipse is probably best known as a Java IDE, but it is more: it is an IDE framework, a tools framework, an open source project, a community, an eco-system, and a foundation.https://www.eclipse.org/eclipse.org-common/themes/solstice/public/images/logo/eclipse-200x200.png
NOTE: As of Helios (Eclipse 3.6), MDT plugins should be installed from the Modeling Update Site.
To install these plugins, point your Install Manager at this site.
Help > Software Updates... > Available Software > Add Site...
Some components are currently in their Validation (Incubation) Phase.