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...
Pattern Tap : Organized Web Design Collection of User Interfaces for Inspiration and Ideas. The CSS Gallery Alternative
idiomatic-css : Principles of writing consistent, idiomatic CSS
XSS Filter Evasion Cheat Sheet - OWASP : This article is focused on providing application security testing professionals with a guide to assist in Cross Site Scripting testing.
Collection of thinking tools and frameworks to help you solve problems, make decisions and understand systems.