BusyCal

BusyCal is an integrated application that combines a beautiful, personal desktop calendar with award-winning calendar-sharing and syncing technology. The software is designed for families and small workgroups, enabling users to share calendars on a local area network and over the internet without the need for a dedicated server. BusyCal also syncs with Google Calendar, making it easy to keep everyone on the same page.

With BusyCal, shared calendars can be viewed and edited by multiple users, and changes are instantly synchronized between users. The software also provides a range of features designed to improve productivity, including live weather feeds, recurring To Dos that display in the calendar view, and a customizable list view.

Beyond that, BusyCal is highly compatible with other applications and devices. It syncs with the iPhone, MobileMe, and just about anything else that supports Sync Services, and it's backward compatible with BusySync.

Overall, BusyCal is a versatile and reliable software option for anyone looking to streamline their calendar management and collaboration. Its robust features and seamless syncing capabilities make it well worth considering for busy families or workgroups.