Whats the difference between BusyCal and BusySync?
BusySync is a System Preference pane that adds calendar sharing capabilities to iCal, allowing you to sync calendars on a LAN and/or with Google Calendar. BusyCal is a desktop calendar application that replaces iCal and provides the sharing and synchronization capabilities of BusySync in one integrated application. In addition to calendar syncing, BusyCal also provides the ability to enter and view event details in a non-modal floating window or an embedded info pane; create To Dos, including recurring To Dos, that display in the calendar and auto-forward until completed; display events in several customizable views including a List View and scrolling Month and Week Views; display graphics, sticky notes, live weather feeds and moon phases in your calendar; apply custom font styles and colors to events; display alarms in a window and on the menu bar; and more.