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.
Lightning brings the Sunbird (Sunbird is discontinued) calendar to the popular email client, Thunderbird and the SeaMonkey internet application suite. Since its an extension, Lightning is tightly integrated with Thunderbird or SeaMonkey, allowing it to easily perform email-related calendaring tasks..
Fantastical is a flexible calendar with natural language event creation, a beautiful calendar and...Free
Material design open source calendar for Android.Free
Microsoft Mail and Calendar
Mail and Calendar apps already built in Windows 10.Free
MineTime is a free, modern and multi-platform calendar application. It connects to several calendar providers (including Google Calendar, Microsoft Exchange and Outlook.com) and provide advanced scheduling features powered by Artificial Intelligence.Free
Cozi is a free online calendar that helps families coordinate activities.Free
The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange...Freemium
Know any more alternatives to Lightning Calendar?Add an application