A branch for 2.4 that is specific to University of Windsor: http://git.evergreen-ils.org/?p=contrib/Conifer.git;a=commitdiff;h=88b1d68561e71c18d5d5098cb79ab0ddbaf61ff6
Libraries that have expressed interest:
Authentication with LDAP already exists.
It does not do automatic provisioning of accounts, it just allows users to sign-in using their LDAP credentials if they already have an Evergreen account.
There's a Perl library: https://metacpan.org/pod/Net::SAML