BusyCal is an award winning calendar app that provides powerful time-saving productivity tools in a friendly, personalized, easy-to-use package.
BusyCal takes full advantage of the latest features in Mountain Lion, including the Notification Center for displaying alerts and banners; and Application Sandboxing for safe computing. BusyCal is compatible with iCloud, Google Calendar, and other CalDAV servers, enabling you to sync and share your calendars through the cloud with other Macs running BusyCal or the built-in Calendar app on OS X, as well as iPhones and iPads running the built-in Calendar on iOS 6.