Lakion/Lionframe
"Welcome to the Lionframe - Rapid REST API development framework, based on Symfony & Sylius."
Building RESTful Services with Zend Framework - phly, boy, phly
As of Zend Framework 1.9.0, it's trivially easy to create RESTful routes for your MVC application, as well as to handle the various REST actions via action controllers.
Do REST in PHP - PHP RESTful Data Services | Dimuthu's Blog
With the addition of all these HTTP verbs WSO2 WSF/PHP 2.0.0 become a great tool for RESTful developers. Specially with the introducing Data Services library it was so easy to make your database a REST service. I m thinking of preparing a series of application to demonstrate the power of WSF/PHP with all these new features.