JCal Pro

JCal Pro is a W3C-validated, multi-language events calendar component with a gorgeous, CSS-based front-end display. Feature highlights include, native Joomla! permissioning for event creation/management and event viewing, multiple calendars including private or public calendars, WYSIWYG event descriptions, administrative theme installation and management, back-end event management, re-captcha support, an integrated search plugin, feature-rich mini-calendar and latest events modules, the all new FLEX module, a convenient content editor plugin, RSS feeds, SEF URL support, robust print-views, JomSocial plugins and Community Builder plugins. source: http://extensions.joomla.org/extensions/calendars-a-events/events/events-calendars/1401