PHPWebCalendar - Web calendar

Basically, its just another web calendar, you can add/delete events, colour code them and all the other basic operations. But this one makes use of the XMLHTTPRequest object to make adding events or loading the calendar a snap!
There is also a control panel, where you can change settings, and view the current status of things. You can make the calendar private (only users that have registered can login), you can let guests add events or not, also you can allow guests to delete events or not.
On the user side, they also have alot of options, when they are logged in they can specify who see`s the event (everybody, members, or only themselves), they can colour code them, specify how long they last or if they occour every week, month or year.