@@ -226,6 +226,8 @@ The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been m
-[keto](https://www.ory.sh/keto/), a permission & access control server, the first open source implementation of ["Zanzibar: Google's Consistent, Global Authorization System"](https://research.google/pubs/zanzibar-googles-consistent-global-authorization-system/).
-[SimpleSAMLphp](https://simplesamlphp.org/), an application written in native PHP that deals with authentication (SQL, .htpasswd, YubiKey, LDAP, PAPI, Radius). Available as [services.simplesamlphp](#opt-services.simplesamlphp).