RegexTester evaluates a set of regular expressions against some test data, and displays the matches.
You can have a number of regular expressions and test strings - RegexTester will give each regular expression a different colour (it starts repeating after 24 colours). It also understands groups - it will highlight each named group, and you can select any group to have that group display in a darker colour.
You can email me at joel at motheyes dot com
RegexTester is licensed under the GNU General Public License (GPL), version 3.0 or later.