regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
WebPlatform.org : Web Platform Docs is a community-driven site that aims to become a comprehensive and authoritative source for web developer documentation.
The Hitchhiker's Guide to Python! : This opinionated guide exists to provide both novice and expert Python developers a best-practice handbook to the installation, configuration, and usa...
Kint : Kint for PHP is a tool designed to present your debugging data in the absolutely best way possible.
In other words, it’s var_dump() and debug_backtrac...
