Calendar and Date/Time
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EDS Calendar Integration
Integrates calendars events with Gnome clock applet
Macro Template
Macro Template is to replace mail templates with macros for date formatting.
DM Sync Requires Restart
This plugin allows you to synchronize addressbooks and contacts stored on the DM mail server
OBM Connector Requires Restart
OBM Lightning Calendar and addressbooks connector
MiniWebView Sidebar Requires Restart
Sidebar that shows a single web page. This allows Thunderbird to be augmented with any user-supplied or third-party web page. The screenshot shows an example - I use my own custom web page to present my Google Calendar in my preferred format.
StormCows Requires Restart
Allows two-way access between Remember The Milk and calendar events or todo items.
Reply Monitor Requires Restart
**This is NOT COMPATIBLE with Thunderbird 31 or newer versions**
Keep track of your emails and replies (Lightning is required).
Note: the name of this add-on has been changed to Reply Monitor because the previous name is a registered trademark.
Lightning Calendar Tabs
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.
Purge Events Plus Requires Restart
Purge events from Sunbird and Lightning files and thereby cleanes the calendar
Montezooma Requires Restart
Montezooma is a Thunderbird Addon that adds zooming functionality to windows.
Send Later
True "Send Later" functionality to schedule the time for sending an email.
More Snooze
This add allow to customize the snooze delay when snooze popup appears (lightning required).
G-Hub Lite
Google Tabs for Thunderbird! G-Hub Lite supports Calendar, Contacts, Drive, Docs, Sheets, Slides, Maps, Search, & Voice. Need Google Workspace support (formerly G Suite)? Check out G-Hub Pro: https://www.schiffner.com/index.php/software/g-hub-pro
mailmindr
Follow up for Thunderbird E-Mails.
Web: https://mailmindr.net/
Twitter: @mailmindr
ReminderFox Requires Restart
ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.
To create your own collections, you must have a Mozilla Add-ons account.