The Application Model Editor provides enhanced support for defining and refining Eclipse 4 model definition files (usually with an extension of .e4xmi). One particularly nifty feature is that the editor can be used to introspect on your running application and make live changes! (Invoke the live editor using the Shift-Alt-F9 or through the Quick Access bar.)
The editor is a component from the Eclipse Platform incubator project (called "e4").
Note: 0.16 is only compatible with Eclipse Platform 4.4 (Luna). The Model Editor is now part of the build for Eclipse Platform 4.5: use Help > Check For Updates… and install "Eclipse e4 Tools Developer Resources".
Previous versions of the model editor can be installed from earlier Eclipse e4 update sites:
- e4 0.14 for Eclipse Platform 4.3 (Kepler): http://download.eclipse.org/e4/updates/0.14
- e4 0.13 for Eclipse Platform 4.2 (Juno): http://download.eclipse.org/e4/updates/0.13
- e4 0.12 for Eclipse Platform 4.1 (Indigo): http://download.eclipse.org/e4/updates/0.12