regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
Sympl : Sympl is a collection of open-source scripts and templates which allow you to automatically and efficiently configure your website and email on a virt...
Sonar : Sonar is a platform for debugging mobile apps on iOS and Android. Visualize, inspect, and control your apps from a simple desktop interface. Use Sonar...
