Samba & LDAP
From SambaWiki
Fedora Directory Server
Fedora Directory Server has a wiki page on integrating with Samba. See [1]
OpenLDAP
OpenLDAP is a widely used LDAP server in Linux environments. It can do a lot of things for all sorts of needs. Samba can use it as a storage backend for accounts and mappings from Windows (TM) SIDs to unix UID/GID. OpenLDAP can also be used to controll mail delivery and other things. You can find OpenLDAP at [[2]]
GUI Tools
LAM [3] - A web frontend to maintain accounts for unix and samba in an ldap server
phpldapadmin [4]
Webmin [[5]]