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Google Calendar Tab Requires Restart

Adds the Google Calendar web interface as a new tab directly into Thunderbird. Creating and viewing events works just as it would in a browser like Firefox

Rated 4 out of 5 stars (104)
70 users

ThunderCal Requires Restart

ThunderCal simply gives you a toolbar button that you can use to run Google Calendar inside Thunderbird. Inspired by the ThunderWave add-on.

Rated 3 out of 5 stars (19)
15 users

Trashcan Requires Restart

Have you ever accidentally deleted an event and didn't notice? Undo is no longer available? Then this extension is for you! All deleted items are put into a special Trashcan calendar for your safety.

Rated 2 out of 5 stars (9)
6 users

Free/Busy Requires Restart

Publish free/busy calendar file (*.ifb) via ftp or to a file. View other people's free/busy info in meeting organizer window. Integrate Thunderbird and Outlook calendars without Exchange server.

Rated 3 out of 5 stars (14)
7 users

Birthday Reminder Requires Restart

Birthday Reminder reminds of upcoming birthdays for all contacts in Thunderbird's address book. Supports Lightning, reminders and even Google Calendar :-)

Rated 4 out of 5 stars (18)
8 users

3e Calendar Requires Restart

Adds support for 3e calendars

Rated 1 out of 5 stars (1)
2 users

Repeat Borders Requires Restart

Adds darker borders to repeat events to distinguish them from single events.

Rated 4 out of 5 stars (1)
6 users