regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
Keep a Changelog : Don’t let your friends dump git logs into changelogs.
schema.org : This site provides a collection of schemas that webmasters can use to markup HTML pages in ways recognized by major search providers, and that can als...
The Big List of Naughty Strings : The Big List of Naughty Strings is a list of strings which have a high probability of causing issues when used as user-input data.
