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.
Collector's Note Cool Calendar, integrated into Thunderbird, See also LookOut to be able to accept Calendar items in mails originating from Microsoft Exchange environments
Adds some tools to import and export folders and messages
Collector's Note Transfer data between just about anything, especially TBird to TBird which is not available natively !!!
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
Collector's Note Work with POP accounts long enough and sooner or later you will end up with duplicated messages. This addon makes it a breeze to find them all and sort them out.
The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.
"No more eina, just a lekker spell checker!"
Collector's Note Get a localised spell checker to make TBird most effective