An easy-to-read, quick reference for PHP best practices, accepted coding standards, and links to authoritative PHP tutorials around the Web
PHP Framework Interop Group
PHP Trends, libraries, and freameworks
Sample code to understand several PHP design pattern
A curated list of amazingly awesome PHP libraries, resources and shiny things.
The League of Extraordinary Packages
A (digital) square where digital companies broadcast the list of tools they are using to realize their products