QmailLdapAdmin is a tool designed in PHP to handle qmail-Schema of Ldap. It provides basic ldap operations, additionally it has a lot of built-in intelligence to support rules to setup emails accounts record in ldap. Mailling lists also can be maintained
mx-LDAP-Suite
mx-LDAP-vacation: auto responses mail on vacation and reads the message from LDAP.
mx-LDAP-admin:Is a PHP based tool. It provides administration of LDAP-Directories
(Add, modify and delete user-accounts,groups,aliases,
samba-workstat