Uses the jQuery FullCalendar plugin to create a stunning calendar view of events, posts and other custom post types
It is serious improvement on the default Events Manager calendar.
It has a ton of built in templates, but some css changes like font family and sizes break the layout.
Makes an outstanding calendar when used with WP Events Manager (which is definitely a 5-star plugin). The FullCalendar plugin, however, lacks some of the functionality of the built-in WP Events Manager calendar. FullCalendar is definitely easier (and more attractive out-of-the-box), but it needs to be upgraded to the full power of WP Events Manager.