Is the built-in OS X Calendar app not doing the trick for you? BusyCal is a great alternative that won’t make you sacrifice the system integration you’re used to. It adds full support for iCloud, Exchange, Google Calendar and other CalDAV servers. It features advanced alarms which can optionally integrate with Notification Center and be snoozed for any length of time.

It even combines weather forecasts with your events and to-dos, and offers multiple views — including a menubar dropdown for a quick overview.

If you’re a Mac user working in a Windows world, BusyCal is now compatible with Exchange 2007, 2010 and 2013, plus hosted services such as Office 365. It supports Exchange Calendars and Tasks, calendar sharing, and meeting scheduling.

There’s a “Find” window that lets you search your entire calendar, regardless of the current view. Also, and importantly, Events and To Dos all sync with the iOS 6 Calendar and Reminders apps.

BusyCal is $29.99 US on the Mac App Store, (free trial available), but I happen to have three copies to give away for free. If you make frequent use of your Calendar but have run up against the various intrinsic faults of the built-in one, you should sign up for a chance to win.

Winners will be drawn on Thursday, September 12 at Noon CDT. Promo codes for three (3) copies of BusyCal ($29.99 US value) will be sent to randomly selected entrants. Open to everyone except for residents of Quebec (as always, apologies).

Sorry, this giveaway has ended.