Zap Calendar is an advanced, native Joomla calendar featuring AJAX, RSS and full iCalendar support.  Here is a summary of the features of Zap Calendar:

Event Management

• Meeting and all day events
• Repeating events
• Confirmed, tentative and cancelled event status types
• Multiple categories per event supported
• Location text or link to location item
• Front end add / edit / delete events
• Link events to articles (article plugin)
• Display map location of event with driving directions (Google Maps plugin)
• Custom field support (more info plugin)
• Comment on events (comment plugins)
• RSVP to events, send reminder e-mail when event approaches (RSVP plugin)
• Synchronize Outlook, Google Calendar, and other iCalendar events into the calendar (ical subscribe plugin)

Calendar Management

• Multiple calendars per site
• Multiple calendars per page (calendar module)
• Personal calendars
• Display yearly, monthly, weekly or daily calendar.
• Display upcoming events (calendar module)
• RSS feed
• AJAX enabled calendar display
• Display mini month with link to full calendar (calendar module)
• Display event list
• Toggle display of events using category controller (category module and plugin)
• Spanning categories across multiple calendars
• Flat and tree based category layouts
• Move groups of categories from one category tree branch to another
• Theme support
• Display / hide event categories on a calendar
• iCalendar export, subscribe
• Share event to social media sites
• Facebook "Like" button (via Facebook plugin)
• Display map of the month's event, show nearby events, display driving directions to event (Google Maps plugin)

Location Management

• Support for import and export of locations as defined in Internet draft "draft-norris-ical-venue-01"
• Show events by location
• Automatic linking of events to locations with same title when importing or synchronizing events (synchronizing events via ical subscribe plugin)
• Support for display of event location by either location text or location item (Google Maps plugin)

Repeating Events

• Repeat daily by 1 or more days (i.e. every day, every other day)
• Repeat weekly or multiple weeks by day of the week (i.e. every week on Wednesday)
• Repeat monthly or multiple months by specific date (i.e 25th of the month)
• Repeat monthly or multiple months by day (i.e. 3rd Tuesday, last Friday of the month)
• Repeat yearly or multiple years by day  (i.e. election day is the first Tuesday in November every other year)
• Repeat yearly or multiple years by specific date (i.e. December 25)
• Repeat by # of occurances, up to a specific date, or repeat forever
• Multiple repeat selections possible (i.e. Mondays and Wednesdays, 1st and 15th of the month, 1st and 3rd Tuesdays)
• Delete or modify individual events within a repeating event series.

Import/Export

• iCalendar import from either a file or URL, multiple categories per event supported
• Automatic category creation when new categories are found during import
• CSV import from a file
• Location import and export support for VVENUE data as defined by the internet draft "draft-norris-ical-venue-01"
• Assigning locations to events with the same location title
• Synchronizing of external callendars like Google and Outlook, allowing events from foreign calendars to be displayed, supports deleting of events from foreign calendars (ical subscribe plugin)

iCalendar Support

• Support for iCalendar repeating events
• Support for importing of iCalendar data via file or URL
• Location import and export support for VVENUE data as defined by the internet draft "draft-norris-ical-venue-01"
• iCalendar export for calendars and individual events from the front end.
• iCalendar subscription support for the front end, support for both PC (http://) and Mac (webcal://) URL's.
• Synchronizing of external callendars like Google and Outlook, allowing events from foreign calendars to be displayed, supports deleting of events from foreign calendars (ical subscribe plugin)

Add-Ons

• Zap Calendar (All versions) - module to display calendars within a module
• Category Controller (All versions) - module to display category control to toggle the display of categories within the calendar
• My RSVP (Pro version only) - module to display RSVP's creating using the My RSVP plugin
• Quick Events (All versions) - administrator module to quickly add events anywhere in the back-end
• Recent Comments (Pro version only) - Module to show comments recently posted using the comment plugin
• AcyMailing (Pro version only) - Plugin to add Zap Calendar events easily to an AcyMailing newsletter.
• Comment (Pro version only) - Plugin to post comments on events, creating a discussion thread for each event
• Community Builder (Pro version only) - Plugin to utilize CB avatars and user profiles
• Face Book Like (Standard and Pro versions) - Show a Facebook "Like" button on your events
• Google Maps (Standard and Pro versions) - Plugin to display the map location of an event in the monthly, weekly, daily and event pages.
• iCal Sync (Pro version only) - Plugin to synchronize iCalendar compliant external calendars with Zap Calendar.
• JomSocial (Pro version only) - Plugin to utilize JomSocial avatars and user profiles
• Month Header (Standard and Pro versions) - Plugin to display a horizontal bar of months at the top of the monthly calendar
• Moon Phase (All versions) - Plugin to display phases of the moon on the calendar
• More Info (Standard and Pro versions) - Plugin to provide adding custom fields to the event
• Password (Standard and Pro versions) - Plugin to provide a simple method of authorizing front-end event editing
• Photo Header (Standard and Pro versions) - Plugin to display a different phot each month at the top of the calendar
• Recaptcha (Standard and Pro versions) - Plugin to add captcha support for website guests when adding new events or posting comments
• RSVP (Pro version only) - Plugin to allow website visitors to attend events and get notified when event details change
• Search (All versions) - Plugin to provide searching for Zap Calendar events using Joomla's search engine
• Zap Article (Standard and Pro versions) - Plugin to link articles to events
• Zap Controller (All versions) - Plugin to display category control to toggle the display of categories within the calendar
• Z Weather (Standard and Pro versions) - Plugin to display weather information directly on the calendar using the Z Weather component

Note: Not all add-ons are available yet for version 4 of Zap Calendar. We are working on migrating them to the latest Zap Calendar release.