Jamm (Java Mail Manager) is a web application to manage virtual email account information stored in an LDAP directory. It is meant as an administration tool for sites using mail servers, such as Postfix and Courier-IMAP.
LDAP+IMAP Web Administration - Will be a tool to manage email accounts on a PostFix+Cyrus+OpenLDAP environment. Multiple IMAP and LDAP server support is planned.
jabook is an addressbook front-end for an LDAP server. It has multiple schema support via XML mapping, and multiple directory support for contact categorization.