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iCal Compatible Calendars

Proprietary Calendar Applications
Open Source Calendar Applications

Proprietary Calendar Applications
  • 37signals Backpack
  • Airset
  • Atlassian Confluence
  • Apple iCal
  • Bookwhen - Calendar based booking
  • Clio
  • Contactizer
  • Buni Meldware Communication Suite
  • Facebook
  • Famundo
  • FirstClass
  • Flightmap
  • Google Calendar
  • Intoweb Calendar
  • Jalios JCMS
  • Joint Contact
  • Joyent Connector
  • Kickstart
  • Lotus Notes
  • Microsoft Entourage
  • Microsoft Exchange Server
  • Microsoft Office Outlook 2007
  • Microsoft Works Calendar
  • Novell GroupWise
  • Novell Teaming
  • Nuvvo
  • Rainlendar
  • Sun Java Calendar Server
  • Teamwork agenda and meetings synchronizer
  • Westlaw (TWEN)
  • Windows Calendar
  • Windows Live Calendar
  • WorkWeek 2 Personal Organizer
  • Wrike
  • WebTrain - Web Conferencing Meeting Reminders
  • WinCalendar for Windows, Word & Excel
  • Zimbra Collaboration Suite

Open Source Calendar Applications
  • Chandler
  • Citadel
  • Claws Mail (vCalendar plugin is required to handle iCalendar in Claws Mail)
  • Darwin Calendar Server
  • Drupal with its event module
  • Evolution the Gnome email/calendar client
  • Horde
  • Kontact (namely KOrganizer and KMail)
  • Lightning (a Mozilla extension for Thunderbird)
  • Moodle will export iCalendar data or let you subscribe to a Moodle iCalendar feed
  • Mulberry
  • OLAT - LMS supporting import and export of personal and shared calendars via iCal
  • OpenCRX
  • Opengroupware.org
  • Open-Xchange
  • PHP iCalendar web based display of shared calendars
  • Plone open source content management system
  • Simple Groupware
  • SPIP a CMS that allows the export of its site calendar in the iCal format
  • Sunbird (a Mozilla stand-alone application)
  • TYPO3 via its Calendar Base Extension
  • WebCalendar
  • WebGUI
  • Webical
  • Zimbra Collaboration Suite