The Shibboleth Consortium is the main vehicle for managing the funding and formal community input for the Shibboleth Project, the open source project responsible for the technical output of the Consortium.
Most of this (public) material is of an older nature and is available in varying forms at https://www.shibboleth.net/
Like all open source projects, Shibboleth can only operate so long as adequate funding is available from the thousands of organizations using the software for free. If you're one of those organizations, please consider joining the Consortium and funding the project.
For more information about the work of the Shibboleth Consortium, please see the public documents: