http://www.edugain.org/technical/status.php
The majority of the infrastructure is using the Shibboleth Consortium ( http://shibboleth.net/ ) software. However, any software conforming to the OASIS SAML 2.0 specifications can be connected to the infrastructure, either as an IdP or a SP.
For the installation and configuration of Shibboleth it is recommended to read the documentation provided by the Swiss research and technology network (SWITCH) federation ( http://www.switch.ch/aai/support/ ).
Other excellent documentation resources are also:

Photo © Scott L. Robertson
More photos:
Localization on the map:
https://www.openstreetmap.org/node/2412584570