JUNA EVENT CALENDAR is very easily used plugin calendar, which has lots of advantages.
Juna IT Easy Calendar - Easy to use for anybody, Easy Calendar provides enormous flexibility for designers and developers needing a custom calendar.
Organize and publish your events in an easy and elegant way using Event Calendar WD.
Spider Event Calendar is a highly configurable product which allows you to have multiple organized events.
*NEW!* An awesome calendar plugin that just works! Shows the upcoming holidays and/or your own events.