Groupware

Agendas partagés

iCalendar?

PHP

Simple Groupware

eGroupware

WebCollab

Java

Open-Xchange

Zimbra

Ressources

http://www.opensourcecms.com rubrique Groupware
http://www.java-source.net/open-source/groupware (Java)

http://thinkofit.com/webconf/workspaces.htm#reviews
http://web2.econsultant.com/collaboration-groups-teams-services.html

http://en.wikipedia.org/wiki/Category:Free_groupware