SQL Injection Cheat Sheet : Samples are provided to allow reader to get basic idea of a potential SQL Injection attack and almost every section includes a brief information about...
Debian New Maintainers' Guide : This document tries to describe the building of a Debian package to ordinary Debian users and prospective developers.
Email Standards Project : The Email Standards Project is about working with email client developers and the design community to improve web standards support and accessibility ...
HTTP Archive : The HTTP Archive tracks how the Web is built.
Byte saving techniques : This is a collection of JavaScript wizardry that can shave bytes off of your code.
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 them from Zend Framework, Symfony2 or Doctrine2 as I'm most familiar with this software).