Have I Been Sold? - Check if your email address was sold without permission
rubular - A ruby based regular expression editor
Creep Alert - Check if friends or colleagues track you via email
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
Optery - See the private info data brokers post about you online
RegEx Generator - RegEx Generator is a simple-to-use application that comes with the brilliance of intuitive regex and is also helping you out to test the regex.