regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
FireLogger : A sexy server logger console in Firebug
Requestdiff : Differentiate HTTP headers and content body of two GET URLs.
Introduction to WAI ARIA : This article is for those who are new to ARIA. You need an understanding of HTML and the potential difficulties that people with disabilities can face...
DesignPatternsPHP : This is a collection of known design patterns and some sample code how to implement them in PHP. Every pattern has a small list of examples (most of t...
