Fapi2 module for Zend-Framework2
Examples of articles published on DWS blog
Akamai NetStorage HTTP API for PHP-PEAR.
Lithium is a light, fast, and highly configurable framework for PHP 5.3+.
A PHP Framework For Web Artisans
base for a full phing install of cms, api and front end
South for the winter
Official PHP Wrapper for Dwolla's API
An easy-to-read, quick reference for PHP best practices, accepted coding standards, and links to authoritative tutorials around the Web
Vagrant boxes for dev
A php swagger annotation and parsing library
FRAPI is an API Open Source framework, run it within your hosting environment parallel to your web app, mobile service or legacy system.
Wordnik PHP public library (deprecated)