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Russian Hunspell dictionary

Ежемесячно пополняемый словарь без поддержки буквы ё. Основа взята из словаря Зализняка, но есть и дополнительная база. Версия от 01.12.2011 года содержит более 176 тысячи слов.

Rated 3 out of 5 stars (66)
11,790 users

SmartTemplates Featured

SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.

Rated 4 out of 5 stars (83)
3,973 users

Confirm-Address

メールを送信する前にあて先確認ダイアログを表示するThunderbirdアドオンです。

Rated 4 out of 5 stars (75)
20,201 users

Magyar helyesírási szótár

A Magyar Ispell helyesírási szótár a Hunspell helyesírás-ellenőrző programhoz készített nyílt forráskódú magyar szótár.

Rated 4 out of 5 stars (56)
9,771 users

Český slovník pro kontrolu pravopisu

Slovník pro kontrolu pravopisu pro aplikace Mozilla

Rated 4 out of 5 stars (36)
16,261 users

Deutsches Wörterbuch, erweitert für Österreich

Deutsches Wörterbuch (neue Rechtschreibung), erweitert mit österreichischen Wörtern, für die Rechtschreibprüfung in Mozilla-Produkten

Rated 5 out of 5 stars (22)
5,527 users

XNote++

Persistent sticky notes associated to emails. You can fulltext search with constraints/email them/print/bookmark/copy to clipboard.

If you have a large screen, you can even display the notes outside of TB's main window, so it won't hide anything.

Rated 4 out of 5 stars (136)
16,721 users

Deutsches Wörterbuch (Schweiz)

Wörterbuch mit Schweizer Varianten der deutschen Schreibungen für die Rechtschreibprüfung in Mozilla-Produkten

Rated 5 out of 5 stars (3)
17,472 users

Automatic Dictionary

Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.

Rated 5 out of 5 stars (50)
3,458 users

Svenska Fria Ordlistan

Ett verktyg för stavningskontroll. Ordlistan har utvecklats ideellt utan stöd från de språkvårdande institutionerna. Använd den på egen risk.

Rated 5 out of 5 stars (22)
7,029 users

Dansk ordbog til stavekontrollen

Dansk ordbog til stavekontrollen i mails, forums, blogs osv. til Firefox, Thunderbird og andre Mozilla-programmer.

Rated 3 out of 5 stars (25)
8,585 users

Diccionario de Español/Chile

Diccionario corrector ortográfico de Español/Chile

Rated 5 out of 5 stars (4)
3,190 users

Tag Toolbar / Tag Popup

Add toolbar for toggling tags.

Rated 4 out of 5 stars (108)
14,132 users

English - Greek Spelling dictionary

Ελληνικό-Αγγλικό ορθογραφικό λεξικό για ευκολότερο ορθογραφικό έλεγχο σε δίγλωσσα κείμενα για Firefox - Thunderbird και Seamonkey

Rated 4 out of 5 stars (75)
3,680 users

AutoarchiveReloaded Featured

Archiviert E-Mails automatisch (Verbesserte Version vom "Autoarchive" Add-on)

Rated 4 out of 5 stars (30)
25,913 users

FiltaQuilla

Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.

Rated 4 out of 5 stars (106)
18,693 users

FlexConfirmMail Stable

Confirm mail address and attachments based on flexible rules.

This is enterprise edition with less updates. Another edition for regular users:
https://addons.thunderbird.net/thunderbird/addon/flex-confirm-mail/

Rated 4 out of 5 stars (11)
25,328 users

Arabic spell-checking dictionary

Arabic spell-checking dictionary for Firefox 3 and Thunderbird 3 from Ayaspell.

Rated 4 out of 5 stars (43)
733 users

United States English Spellchecker

This dictionary is no longer maintained. Use this dictionary instead.

Rated 4 out of 5 stars (207)
4,235 users

Grammalecte [fr] (for Thunderbird)

Correcteur grammatical dédié à la langue française. Inclus : conjugueur, formateur de texte et dictionnaires orthographiques.

Rated 4 out of 5 stars (20)
7,654 users