IRsoft - Software and more by Ingmar Runge

This is a list of some cool Thunderbird Extensions. All Extensions listed here are Thunderbird 1.5 compatible.

QuoteCollapse

Adds a [+] in front of every quote in emails, making it possible to collapse or expand cite blocks.

CuteMenus

Nice icons for almost all Thunderbird menus.

Display Mail User Agent

Displays an image indicating which email program the sender of an email uses.

MinimizeToTray

Being also available for Firefox, this extensions adds a shortcut (Ctrl+Shift+M) to hide the program window. One can reopen it by clicking the program icon which is added next to the clock in the Windows taskbar.

Quote Colors

Colorizes nested quotes to make it easier to distingiush them.