Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
rubular - A ruby based regular expression editor
Productivity Power Tools - Extension for Visual Studio - A set of extensions to Visual Studio 2012 Professional (and above) which improves developer productivity.
RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.
VS Code Theme Studio - Create your own VS Code theme easily, within your browser
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.