iCal - share your events with your friends and see your friend's calendars.
Quickly remove useless data from iCal.
A free utility that copies events from Now Up-to-Date to iCal.
Alternative to Apple's iCal birthday calendar that has a range of features that has made it indispensable for many iCal and Address Book users.
Built to sync events from iCal calendars between more Mac computers.