Sure. I have a couple of examples. :)
Identity Manager - for auto account provisioning and directory sync. One cool thing we do with this is sync a very limited set of students and attributes into an LDAP directory that our offsite Resnet provider then uses for network authentication.
Access Manager - web single sign on with federated authentication
Netstorage - clientless webdav, basically.
iFolder - think locally hosted Dropbox with admin controls and auto provisioning
iPrint - install printers by selecting them from a webpage
There's a lot of other ones where the "best tool" is a function of the specific job. For example, the SUSE enterprise server is better than RHEL for me, because it is the platform for OES2, and it's more efficient to have to maintain only one (server) flavour of Linux. Groupwise has issues with 3rd party support, but can support 4 times as many users on the same hardware as Exchange. NTFS permissions are more fine grained, but Netware trustees give you automatic filesystem traversal rights. And so on...
eDirectory vs Active Directory is like emacs vs. vi though. Let's stay away from that one. :)