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Provider for Google Calendar

Allows bidirectional access to Google Calendar

Rated 3 out of 5 stars (1,648)
184,226 users

Calendar Tweaks Requires Restart

Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.

Rated 4 out of 5 stars (83)
2,256 users

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)
79 users

Lightning QR Code Add-on

Integrate QR codes for calendar events into tooltips for easy transfer to mobile devices.

Rated 5 out of 5 stars (14)
29 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)
16 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)
7 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)
6 users

Year view Requires Restart

Year view for calendar.

Rated 4 out of 5 stars (58)
69 users

3e Calendar Requires Restart

Adds support for 3e calendars

Rated 1 out of 5 stars (1)
2 users

Timeline Requires Restart

A Timeline calendar view

Rated 4 out of 5 stars (34)
4 users

Repeat Borders Requires Restart

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

Rated 4 out of 5 stars (1)
4 users