Today marks the release of BusyCal 2, the premier third-party calendar app on the Mac. This new version takes all that was good about version 1 and builds upon it. The new UI is more customizable. Do you want to show 12 days in weekview and reflect your week starting on Wednesday? BusyCal 2 has got you covered.
This new version also ups its game with respect to filtering and viewing calendar data with smart filters. Overall, the application got polish, Mountain Lion compatibility (including Notification Center), and several new features. Did I mention there is no torn paper?