The Lightning project produces an extension that adds calendar and scheduling functionality to the Mozilla Thunderbird mail and newsgroup client and SeaMonkey internet suite. Lightning is an iCalendar compatible calendar.
Organize your schedule and life’s important events in a calendar that’s fully integrated with your Thunderbird or Seamonkey email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
The software is released under an open source license.
- Viewing remote calendars.
- Google Calendar calendars.
- Support for Outlook meeting requests.
- Offline support.
- Task mode.
Developer: Mozilla Foundation / Mozilla Corporation
License: MPL 2.0
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