CalendarX - Get a calendar your audience can follow
Teamweek - A project management software to help you get the best overview. Plan fast, change plans faster!
Teamup Calendar - Cloud-based calendaring using capability URL, application developed in Zurich, Switzerland.
VCalendar - VCalendar is an open source Web calendar application for posting and maintaining events and schedules online.
Calendarix - Calendarix is a powerful and easy to use web-based calendar that runs on PHP and MySQL.
CalReply - CalReply is a Calendaring platform that enables TV networks and businesses to enable fans and viewers to subscribe to event schedules.