Scalix

Scalix is an e-mail and groupware server that runs on Linux, licensed under the Scalix Public License (SPL).

Scalix provides e-mail, group calendaring and other collaborative software, which are standard in groupware. It can be accessed from many different clients, most notably Microsoft Outlook, Novell Evolution (formerly Ximian) and Scalix Web Access, an AJAX-based web email and calendaring client that combines the functionality of desktop email with the ease-of-use of a browser.