Contacts

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LookOut Featured

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

Rated 4 out of 5 stars (134)
171,585 users

ReminderFox

ReminderFox displays and manages lists of reminders and ToDo's. ReminderFox makes sure you remember all of your important dates via easy-to-use lists, alerts, and alarms, right in your browser without the need for a separate calendar program.

Rated 4 out of 5 stars (427)
136,444 users

Google Contacts

Access to Google contacts and synchronize them with Thunderbird address books.

Rated 4 out of 5 stars (220)
101,298 users

Zindus Featured

Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)

Rated 4 out of 5 stars (196)
51,122 users

Contacts Sidebar Featured

Displays the address books in a sidebar in Thunderbirds 3-pane-window and can be toggled with the F4 key or a toolbar button.

Visit my Contacts Sidebar site for recent versions and news.

Rated 4 out of 5 stars (223)
41,470 users

gContactSync

Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.

Rated 4 out of 5 stars (151)
32,116 users

Addressbooks Synchronizer

Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers

Rated 4 out of 5 stars (55)
32,056 users

ThunderBirthDay

Display birthdays from the Thunderbird addressbooks as events in Lightning.

Rated 4 out of 5 stars (63)
25,116 users

Duplicate Contact Manager

Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.

Rated 3 out of 5 stars (82)
24,564 users

Contact Tabs

Contact Tabs enhances Thunderbird to give you quick access to all your contacts directly from Thunderbird's main window: Use the powerful search field to find your contacts and open them in a new tab for viewing and editing.

Rated 5 out of 5 stars (39)
19,340 users

Auto Address Cleaner

Removes comment, display name automatically from addresses before sending mail.

Rated 5 out of 5 stars (40)
15,525 users

AddressBookTab

It adds a button that can be put in toolbars and that open the addressbook in a new tab

Rated 4 out of 5 stars (54)
15,162 users

ExQuilla for Microsoft Exchange

Thunderbird email accounts, including contacts, connecting to Microsoft Exchange Web Services.

Rated 3 out of 5 stars (62)
12,424 users

Telify

Converts telephone numbers into clickable links for use with CTI applications, SIP clients, Skype, Netmeeting, snom phones, the AGFEO TK-Suite Client and SerVonic IXI-PCS.

Rated 4 out of 5 stars (46)
10,613 users

ThunderSync

Allows to synchronise Thunderbird's addressbook with external directories/files. Every contact is exported/compared with an external file. Right now, only vCard version 2.1 is supported as export file format.

Rated 4 out of 5 stars (8)
9,324 users

Display Contact Photo

Displays the contact photo/image/picture of the sender/recipient while reading or composing a message. Supports photos in a local folder and the 'Face' header for embedded photos. The add-on adds new generic photos and many styling possibilities.

Rated 4 out of 5 stars (74)
8,913 users

SyncKolab

SyncKolab can synchronize your calendar, address book and tasks against an IMAP server in Kolab formats version 1 (vCard/iCal) or version 2 (XML) or turn your Thunderbird/Lightning into a native Kolab Client (http://kolab.org).

Rated 3 out of 5 stars (71)
7,813 users

Select Address Book Text

Copy and paste a name, phone number, address or other text from your Thunderbird address book quickly, with just a single menu click.

Rated 4 out of 5 stars (34)
5,710 users

sipgateFFX for Firefox and Thunderbird

The sipgate extension enables a practical overview for your account, direct call list notifcations, a speed access to several parts of sipgate's website, initiaiting click2dial calls, sending messages and faxes directly from your browser.

Rated 4 out of 5 stars (17)
5,464 users

EMail Address Crawler

Automatically fill your address books or send mass mails with e-mail addresses extracted from all your e-mails.

Rated 4 out of 5 stars (81)
4,731 users