OJI - (ββΏβ) Interactive text emoji maker!
rubular - A ruby based regular expression editor
Asky - ASCII art as a service α(ββΈβΌβΆ)α
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
Lefty - Discover and use Instagram photos
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.