Name: FullCalendar
Description: Most users find developing their own calendar UI not that quite easy but with jQuery FullCalendar you make it easy and fast!
Some of Specifications:
- Google Calendar Interation
- ajax, json, and array data source
- Event Handlers refetchEvents, removeEvents, renderEvent and many more
- Draggable and Resizeable
Demo: http://arshaw.com/fullcalendar/
Download: http://arshaw.com/fullcalendar/download/