Open-Xchange collaboration suite. Visit http://www.open-xchange.com/header/community_area.html to get more information about getting support and reporting bugs.
MyTaskScheduler-v1.0 is a cross platform personal task scheduling application. It provides a task listing system controlled by a calendar. It enables the users to record tasks and set reminders for a task on any day of any year. [Requires JRE 1.6.02]
Monket is an Ajax enabled online calendar. Drag and drop events to change dates, drag the start/end of an event to create multi-day events, create and edit events without refreshing the page, all with an iCal style interface.