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.
Allows bidirectional access to Google Calendar
Switch the signature on/off or choose a new one from your predefined set...
Access to Google contacts and synchronize them with Thunderbird address books.
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Note from Mozilla: This add-on has been discontinued. Try MinimizeToTray Revived instead.
Minimize applications to the system tray.
Collections are groups of related add-ons that anyone can create and share.Explore Collections