The Gordano Messaging Suite (GMS) is a highly flexible and reliable suite of messaging products. Customers can choose which components meet their needs from email, Webmail, collaboration, instant messaging, calendaring, SMS, and list server software all of which can be complimented by high level anti-spam, anti-virus, and archiving options.
Kerio MailServer is an email and collaboration suite that comes integrated with direct over-the-air (OTA) ActiveSync support, over 14 anti-spam layers (including SpamAssassin), dual anti-virus options (including a ClamAV plugin), collaboration features in Outlook, Entourage, Outlook Mobile, VersaMail, WebMail, and iCal, email archiving, and live automated backups. It supports a variety of SSL-encrypted communication protocols including POP3, IMAP, STMP, and HTTP for WebDAV, CalDAV, Web mail, and wireless ActiveSync. Wireless capabilities include direct email push, synchronization of calendar events, contacts, and tasks, and remote wipe for Windows Mobile devices to delete company data in the event the device is lost or stolen. Authentication options include Active Directory, Apple Open Directory, PAM, and an internal database. It can be administered remotely using an encrypted channel.
mod_psldap is an Apache module that performs authentication and authorization against an LDAP server with LDAP based session management. It also provides Web 2.0 based capabilities to add, edit, move, and create new records in the LDAP store, leveraging XSL stylesheets to offload heavy processing to the clients and reduce bandwidth consumption by up to 95% or more.
Wallal is a standalone LDAP-to-Web gateway. It allows you to search, add to, modify, and delete from an LDAP database. It can format entries and validate them upon submission, and the entries displayed are fully configurable. It was designed with a "personal" LDAP server in mind (one that is used primarily as a phonebook). However, it should be reasonably easy to modify it to do more complex operations on a directory.