syncevolution

SyncEvolution - a SyncML and CalDAV/CardDAV client
SyncEvolution allows you to sync your contacts and calendar with SyncML
and CalDAV/CardDAV servers on the Internet, such as Funambol, Ovi,
Google Contacts, and Google Calendar.

Maintainer of this package is : Ove Kaaven <ovek@debian.org> (http://people.debian.org/~ovek/harmattan/)

It works perfectly with ownCloud 5.0.10.  Notes, Tasks, Calenders and Contacts can be synced.

You can find some infos about this here

http://www.nrtm.org/?s=VJOURNAL

notes are handled as journal for a specific calendar.

It is also possible to have multiple calendars and tasks (one for each calendar) .

Calendars:
backend = CalDAV
database =  {link to owncloud}/remote.php/caldav/calendars/{user_name}/{calendar_name}

default calendar_name is defaultcalendar

Adressbook:
backend = CardDAV
database = {link to owncloud}/remote.php/carddav/addressbooks/{user_name}/contacts

Tasks:
backend = CalDAVTodo
database = same as for calendar

Notes:
backend = CalDAVJournal
database = same as for calendar