PSX is a framework for developing dynamic websites in PHP. The goal of PSX is to help you developing RESTful APIs serving web standard formats like JSON, XML, Atom and RSS. It has a focus on social technologies and provides classes to use and implement OAuth, OpenID, Opengraph, Opensocial, Opensearch, PubSubHubbub, Atom, and RSS. For more informations please visit http://phpsx.org.