iCal birthday and anniversary calendars with alarms.
Genealogy tool for date calculations.
Lunar - converts Korean-Lunar calendar dates for the years from 1901 to 2050
Give it two dates and/or times, and it tells you the length of time between them
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.
