BiDi Mail UI

Direction control and BiDi-related charset misdetection correction

Signal Spam

Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).

EnForward

Save your email into Evernote by forwarding it to Evernote email address.
Before you use it, you need to specify your Evernote email address (see the screenshot).

This function can be invoked by "Forward to Evernote" in the context menu.

NewsWorthy for Thunderbird 1.5 Requires Restart

Making Thunderbird newsworthy (Usenet client support)...

CALDAV - Search/Subscribe Requires Restart

Add CalDAV search & subscribe feature to Lightning

Ungender

Eine Thunderbird-Erweiterung, welches Binnen-Is und Ähnliches von Webseiten entfernt. Es basiert auf der bekannten Firefox Erweiterung Binnen-I be gone.

Mutt Keys Requires Restart

Creates Mutt like key bindings for Thunderbird. Inspired by the mouseless extension.

Remove Duplicate Messages Requires Restart

If you have duplicate messages (e.g. from merging folders or downloading messages several times) you can use this tool to find and remove them from the selected folder and its subfolder by rightclicking on a folder and choosing "Remove duplicates..."

RSS Dashboard Requires Restart

This addons gives you a dashboard-style view of your RSS feeds, like iGoogle or Netvibes (widget view). This is an experiment, so it is still very rough. Right now, consider this as a proof-of-concept rather than a real addon.

Google Reader Tab Requires Restart

Adds the Google Reader web interface as a new tab directly into Thunderbird. Anything works as it would in a browser like Firefox. This addon is based on Google Calendar Tab.

Smileyfixer

Fixes smileys that show in emails created by Outlook as J.

Sender Name Requires Restart

Next Unread Thread (Mark All Read)

Adds a Thread button, marks current thread or conversation as read and moves to the next unread message

Folderpane Tools Requires Restart

Allows for customization of the folder pane. Accounts can be rearranged and the startup folder can be chosen.

TweeQuilla Twitter for Thunderbird (Obsolete) Requires Restart

Twitter for Thunderbird (Bundle). Provides twitter statuses in the format of email messages, and allows updating Twitter status from Thunderbird.This addon packages the TweeQuilla-app extension with the required "New Account Types" extension.

FromToGMAP Requires Restart

Calculation of the distance and delay between reference address and highlighted address with the Google Map engine. Right click with mouse, select 'Distance with FromToGMAP' and the calculation of distance and delay appear in a popup

Colored Diffs

Color diffs sent by SVN/CVS/GIT/Mercurial...

PDF Viewer Requires Restart

Opening and viewing PDF attachment file inside a Thunderbird tab

All mail from all accounts Requires Restart

Add a toolbar button to send and receive all mail from all accounts for Leopard theme.

Lowercase Email Addresses in Message Headers Requires Restart

Shows lowercase email addresses in message headers and their tooltips.