Below is the documentation available for V3 of the Shibboleth Identity Provider, including all 3.x patch and minor upgrade releases. Documentation is split up in to two parts: documentation meant for individuals that are deploying and managing an Identity Provider and documentation meant for individuals that are developing custom extensions for the Identity Provider.
The of the Identity Provider is V3.1.1, and the is V2.4.4. A decision by the Shibboleth Consortium Board and the Project team on the end-of-life date for the V2 Identity Provider is expected by the end of April 2015.
All software, including archived releases, is available from http://shibboleth.net/downloads/identity-provider/ and each release is accompanied by a detached PGP signature using one of the keys listed in the project's PGP_KEYS file.
High-level information to get started with SAML and Shibboleth can be found in the Shibboleth Concepts wiki space.