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