ownCloud gives your users an universal access to their files through a web interface or WebDAV.
It also provides a platform to easily view & sync your contacts, calendars and bookmarks across all your devices and enables basic editing right on the web
Visit http://owncloud.org/ for more information abour ownCloud.
- Similar addons
Calendar and addressbook sharing
Share your calendars and addresses with CalDAV and CardDAV protocols.
Instant messaging service
Provides a Jabber service for your organization.