PoCoMy: Postfix + Courier + Mysql :: Webfrontend for administration. Features: Virtual domains, forwarding, aliases, sender aliases, multi user, multi language, privileges system, delegation of rights per domain, ...
LdapCyradm is a management tool that allows admin and help desk staff to easily do day to day management of an LDAP backed Cyrus imap system. It also integrates the management of the SquirrelMail plugin AmavisNewSQL for per user w/b lists and quarantine