List of applications with iCalendar support

The following is a list of notable applications which support iCalendar:
Embedded software - Comes with device/other software
* macOS Calendar - Comes with Apple's computers like MacBook
* iOS Calendar - Comes with Apple's mobile devices like iPhone and iPad
* Facebook Events - Comes with Facebook application which runs on all major platforms
* Google Calendar - Comes from Google, which has variants for all major platforms
* Microsoft Exchange Server - This is the backend server from Microsoft and supports access via Microsoft Office Outlook (now a cross platform Outlook client but originally only with Office), OWA (Web browser) & ActiveSync (on older mobile devices). Note that Exchange includes E-mail & Contacts handling.
* Microsoft Works Calendar - Obsolete calendar for non-office users which came with Works; replaced by Office Home
* Windows Calendar - Very obsolete calendar for oldest Microsoft Windows users; replaced by Windows Live
* Windows Live Calendar - Obsolete calendar for old Microsoft users; replaced by new Outlook
* BlackBerry Calendar—Calendar application used in the BlackBerry device ecosystem
* Palm, Inc. Calendar—Calendar application used in Palm devices.
Discrete applications and services
* 37signals Backpack
* Alfresco (collaboration portal that allows export of site calendars in the iCalendar format)
* Balsa a lightweight email client for GNOME
* Chandler
* Citadel
* CiviCRM With its CiviEvent module
* Claws Mail (the vCalendar plugin is required to handle iCalendar in Claws Mail)
* Clock Software with Clock PMS property management system's iCal synchronisation of availability
* Atlassian Confluence
* Darwin Calendar Server
* DAViCal server for calendar sharing
* Dolibarr ERP & CRM for calendar module
* Drupal with its event module
* Eliademy (cloud based e-learning platform)
* eM Client
* Evolution the Gnome email/calendar client
* FirstClass
* fruux
* HCL Notes (iCalendar support requires enabling "Compatibility Mode")
* Hippo CMS
* Horde
* Huddle
* IBM Notes (versions above 8.01 only—iCalendar support requires enabling "Compatibility Mode")
* IceWarp
* Joomla there are several plugins available
* jqxScheduler
* Kontact (namely KOrganizer and KMail)
* Kopano Collaboration Platform
* Kolab free and open source groupware suite
* Lightning (Mozilla extension for Thunderbird mail/news client and SeaMonkey internet application suite)
* LiquidPlanner
* Lotus Organizer
* Mailfence
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* Microsoft Entourage
* Moodle will export iCalendar data or let you subscribe to a Moodle iCalendar feed.
* Sunbird (a Mozilla stand-alone application, discontinued)
* Mozilla Thunderbird mail/news client (with Lightning extension)
* Mulberry
* MyPhoneExplorer
* Nextcloud
* Nokia N9 Calendar
* Nokia N900 Calendar
* Novell Groupwise
* OLAT - LMS supporting import and export of personal and shared calendars via iCalendar
* Open Atrium - Drupal based
* Open-Xchange
* Opengroupware.org
* Orage - an XFCE application. (No longer maintained.)
* Org-mode - an Emacs mode for organising your life.
* ownCloud - file storage and services including WebDAV, CalDAV and CardDAV.
* Plone open source content management system
* Projektron BCS
* Rainlendar
* Request Tracker - a ticket-tracking and call-center application. Exports iCalendar data.
* SeaMonkey internet application suite (with Lightning extension)
* Semantic Mediawiki semantic extension to MediaWiki
* Simple Groupware
* SOGo - an integrated groupware with Apple iCal, Mozilla Thunderbird support and native Outlook compatibility
* SPIP a CMS that allows the export of its site calendar in the iCalendar format.
*Studo - iCal import
* Sun Java System Calendar Server
* Twproject
* Textpattern, with iCal or Calendar plugin.
* Tiki Wiki CMS Groupware Calendar exports to iCal and generates hcal
* TrackerSuite.Net
* Tryton
* TYPO3 via its Calendar Base Extension
* Web2project
* WebGUI
* Westlaw (TWEN)
* WordPress via plugins
* Wrike
* Yahoo Calendar
* Yandex Calendar
* Zarafa Collaboration Platform
* Zimbra Collaboration Suite

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