regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
I Love Typography : I Love Typography, devoted to fonts, typefaces and all things typographical.
CSS Reference : Learn by example: cssreference.io is a free visual guide to CSS. It features the most popular properties, and explains them with illustrated and anima...
StaticGen : Top Open-Source Static Site Generators
API Security Checklist : Checklist of the most important security countermeasures when designing, testing, and releasing your API.
