Sync Personal Address Book or another addressbook with Google.
Manage your Gmail contacts from Thunderbird. And vice-versa.
Sync Thunderbird addressbook(s) with your Zimbra account. The extension synchronizes:
* Personal Address Book
* other (selected) addressbooks
* shared addressbooks
* the Global Address List (GAL)
Works with all Zimbra versions and editions.
For help and bug-reporting, see the faq: http://www.zindus.com/faq-thunderbird/