Zap Calendar is an advanced, extendable, full featured calendar application for Joomla, designed to meet demanding calendar needs. Many features of Zap Calendar you will not find in other Joomla calendar applications. These features include:

Extensive iCal Support - iCal is the standard format for transfering calendar events between applications, and Zap Calendar was written to fully support this standard. Zap Calendar provides import, export and synchronization of calendar events from external sources. Downloading or subscribing of events to calendar programs such as Outlook, Thunderbird and Google Calendar is supported. iCal repeating events are supported. Using Zap Calendar's iCal subscribe plugin, you can create an aggregate iCal feed by combining both external and local events and publish them as an iCal URL for downloading or subscribing.

Plugin Support - Zap Calendar is the first Joomla calendar program that can be extended using Zap Calendar plugins. These plugins provide additional functionality to the calendar, including plugins for searching, weather, mapping, and social networking features.

Third Party Application Support - Zap Calendar provides support for several popular Joomla extensions, including Community Builder, JomSocial, JomComment , sh404SEF and Z Weather. Zap Calendar also includes a Google Maps plugin, allowing you to show the location of your events on a map.

AJAX Support - Zap Calendar's calendar view is AJAX enabled, allowing users to browse the calendar by day, week, month or year without ever refreshing the screen page. AJAX support is extended to Zap Calender modules, allowing independent browsing of calendars when multiple calendars are present on a page. AJAX support can also be found in the Comment, RSVP and Google Maps plugins.

Social Networking Support - Your website users can comment and RSVP to events using the provided plugins. In addition, Zap Calendar provides support for Community Builder and JomSocial by displaying a user's profile picture next to their comment or RSVP. When using JomSocial, event activities are posted to JomSocial's wall and JomSocial points are distributed, if enabled.

RSS Support - Zap Calendar supports publishing upcoming events in RSS format.

Event Management - Multiple categories per event, repeating event support, linking events to articles, front-end event editing/creation, quick event creation mode, importing of events from iCal file or URL.

Calendar Management - Multiple calendars per site, multiple calendars per page (via modules), spanning categories across multiple calendars, flat and tree-based category layouts, theme support, display/hide event categories on a calendar

Zap Calendar is released under the GPL license, which means you are freely able to view and modify the source code if you wish. Subscribers receive software updates for 1 year. There are two versions of Zap Calendar available: Standard and Pro. The Pro version includes everything that the Standard version offers, plus the inclusion of the iCal Subscription, RSVP, comment, JomSocial, JomComment and Community Builder plugins, and membership to the Pro Club for one year. The Pro Club offers newly released plugins at no additional charge. Zap Calendar is available now.

Two demonstrations of ZapCalendar are available:

ZapCalendar.com - This demonstrates an AJAX enabled calendars for American history and New York sports teams.  These calendars utilizes the following plugins: RSVP, comment, Community Builder, Z Weather, Google Maps and iCal subscription.

AmericanHistoryCalendar.com - This AJAX enabled calendar displays birthdays and events in American History.  This site utilizes the Google Maps and Joomla search plugins.