Atmail

Atmail provides a complete web-based CalDAV client, written with PHP Zend. The user-interface uses the jQuery toolkit to provide an easy to use Ajax interface to an existing CalDAV server.

DAViCal Support
Atmail has been tested extensively against DAViCal 0.9.6 - 0.9.7.6 but as at early 2011 does not work reliably against 0.9.9.x versions.

Features

 * A complete Ajax Web Calendar which supports creation of events, tasks, and allow users to schedule work and appointments
 * Daily and weekly calendar view included
 * Intuitive Web interface for creating, moving and resizing scheduled events
 * View shared Calendars, users availability and all the features you'd expect in a Groupware solution
 * Support for IE, Firefox, Safari, Chrome and modern browsers
 * Delegation support for shared Calendars

More Info

 * Product info on Calendaring
 * Online Demo - Login to the sample account > Settings > Calendar settings, and specify an existing DAViCal server/account
 * Atmail Outlook Add-in - Outlook connector to sync contacts and calendar events to an Atmail Server
 * Atmail Open Project Ended - CalDav support (last build in 2009) GitHub SCM (DAViCal support untested)