Some add-ons for junit which may never made into the official release. In short, things that work for me, may work for you, and may as well be violating the spirit of JUnit and/or unit tests.
A eclipse plugin to test regular expressions (regex). Full highlighting of regexp syntax. Tooltip with detailed description of regex items, etc... Very usefull. Project page has java-applet to test regexp online. (Regex implementation: java.util.regex.*)
GTLRegEx is an open-source software developed in Java. It is designed to help developer and advanced users Generate Test and Learn Regular Expressions. GTLRegEx provides tools to help creating (creation tree), understanding (with the tree of the regex) r
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