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Open Source Collaboration, providing:
* Integration with your existing Linux mailserver
* Native mobile phone support
* Outlook "Look & Feel" webaccess
* Stable Outlook sharing (100% MAPI)
Citadel is a turnkey open-source solution for email and collaboration. One simple installation delivers a multitude of powerful features, including: email, calendaring/scheduling, address books, bulletin boards, mailing list server, instant messaging, multiple domain support, modern AJAX-style web interface
It's a simple COM-.NET plug-in created for Outlook 2003. Once installed, every Outlook user will be able to subscribe, delete and reload a remote iCalendar.