Directory Proxy Server
Sun java system directory server enterprise edition - directory proxy server: overview.
http://wwws.sun.com/software/products/directory_proxy/home_dir_proxy.html
Directory Server
Sun java system directory server enterprise edition - directory server: overview.
http://wwws.sun.com/software/products/directory_srvr/home_directory.html
Identity Server
See: sun java system access manager.
http://wwws.sun.com/software/products/identity_srvr/home_identity.html
Identity Synchronization for Windows
Sun java system directory server enterprise edition - identity synchronization for windows: overview.
http://wwws.sun.com/software/products/identity_synch/index.html