iCalendar

PHP iCalendar, Démo
http://wiki.mozilla.org/Calendar:Home_Page
http://en.wikipedia.org/wiki/ICalendar
http://en.wikipedia.org/wiki/List_of_applications_with_iCalendar_support
http://www.kigkonsult.se/iCalcreator
Démo

WebCalendar, Télécharger
WebCalendar Wiki

DAViCal

Radicale (Py)

Discussion

http://www.linux.com/learn/tutorials/402382:the-five-best-open-source-calendar-servers-for-linux

Groupwares offrant des agendas iCal

Intégration WebCalendar Drupal
Drupal Event
http://drupal.org/project/Modules/category/61