ABtoiCal is an AppleScript that creates repeating events in iCal from the birthdays and anniversaries in Address Book.
a Cocoa application for MacOS X that can generate a Gregorian calendar for any year (or a single month in a year) from 1 AD to 9999 AD
This simple application allow any user to give a look at the calendar files provided with the Mac OS X (found in '/usr/share/calendar').
CalendarCreator.service adds events and todos to iCal.
(commercial)DayChaser is a calendar and scheduling application that not only allows you to organize your personal time but can also organize your work habits. Sporting a very user friendly Mac OS X native user interface, DayChaser lets you create and manage multiple calendar documents simultaneously.
DesktopCalendar is a little calendar application which changes your desktop into a calendar. It also shows today's date on the Dock or menu bar.
EventSync is an application for OS X 10.4 and up that allows users to sync their facebook events with iCal.
?Geburtstag? is German for ?Birthday? which makes GeburtstagsChecker an application that checks for upcoming birthdays and reminds you of them to avoid potential embarrassment if your memory is rather weak.
(shareware) An easy to use text-based editor for iCal appointments. Coverts iCal (ics) files to vCal (Palm). Imports from tab- and comma-delimited file, and from plain text.
iMeet iCal is an application that syncs MeetingMaker and iCal.
MagiCal is a menu-based clock and calendar. It features a huge range of configuration options for how the time and date are displayed, and can operate either in addition to, or instead, of the built in system menu clock.
Mom's Calendar provides a simple printable calendar for keeping track of events.
NumSemaine creates a .ics file with the week's number.
PandoCalendar is a useful Mac-only program places a fully functional calendar on your desktop. The look is completely customizable.
PreMinder is a calendar which has been in development on and off since 1996. It features a month, week or year view calendar, and a separate window which shows a daily view and schedule. The reminder can be edited in the daily view.
(shareware) QueueNotice is shares "calendar", "contact" with several members. It becomes a shared calendar when a "calendar"," contact" category name is set up in "QueueNotice".
Rili is very simple, small calendar.
Mozilla Sunbird is a cross-platform calendar application, built upon Mozilla Toolkit. Our goal is to bring Mozilla-style ease-of-use to your calendar, without tying you to a particular storage solution.