PHP Federation Libraries

With federation technologies running rampant, I've been working with different methods of providing federated SSO between different applications.  As I go through this process, I always look to see if someone else has developed a library to make my life easier.  In the case of PHP, I have found a couple libraries that are very promising for making a retrofit to applications simple for OAUTH and SAML.  They are:

• SimpleSAMLphp
• ohmy-auth

Enjoy