BusyCal 1.3.3が出ていました。iCal互換カレンダー。シェアウェア（$49）。
BusyCal 1.3.3 Release Notes
July 27, 2010
What’s new:
- Fixed Google “cannot delete a cancelled event” syncing error
- Localization improvements
- Other minor bug fixes
For more info, see the Release Notes History.