Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
URL Link is a small Firefox and Thunderbird extension that allows you to select a non-URL in a mail/news message or web-page, and open it in a browser window.
Displays a small graphic visualising the context (thread) of the currently selected email.
Color-codes compose windows depending the active e-mail identity, to avoid sending messages from the wrong account.
Collections are groups of related add-ons that anyone can create and share.Explore Collections