John Maisey
iCal Dupe Deleter
FreeRemove duplicate events and to-dos from iCal.
Mac
Dates to iCal 2
Trial versioniCal birthday and anniversary calendars with alarms.
Mac
iCal Reply Checker
Trial versioniCal add-on for managing event invitation replies.
Mac
YAI
Trial versionTranslates Outlook Exchange style invites for iCal.
Mac