Universal Label Decorations
Eclipse plugin containing a configurable decorator for icons and labels. Can be adjusted to decorate labels depending on substring matching (optional using regular expressions from JDK1.4 or greater).
An example is to decorate all packages having the substring "test" in their name as JUnit-Packages.
Universal label decorations can be adjusted on a preference page and will be shown in the Package Explorer, the Navigator and others.
More detail: http://www.jave.de/eclipse/labeldecorator/index.html