Phantastic!
"EclEmma is a free Java code coverage tool for Eclipse, available under the Eclipse Public License. Internally it is based on the great EMMA Java code coverage tool, trying to adopt EMMA's philosophy for the Eclipse workbench:
* Fast develop/test cycle: Launches from within the workbench like JUnit test runs can directly be analyzed for code coverage.
* Rich coverage analysis: Coverage results are immediately summarized and highlighted in the Java source code editors.
* Non-invasive: EclEmma does not require modifying your projects or performing any other setup.
The Eclipse integration has its focus on supporting the individual developer in an highly interactive way.
The update site for EclEmma is http://update.eclemma.org/."