Privacy Pal - Enter any website address to get a quick, simple overview of its Terms of Service.

rubular - A ruby based regular expression editor

Ghostery - Privacy tool for transparency and control

RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.

TrackMeNot - TrackMeNot is an extension for the leading web browsers that allow the users to protect the web searchers from data profiling and surveillance by search engines.

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.