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GNOME Calendar

GNOME Calendar is a simple and beautiful calendar application designed to perfectly fit the GNOME…

21 Alternatives To GNOME Calendar

Calcurse

Calcurse is a calendar and scheduling application for the command line.

CalenGoo

Features | 1.0.175 for Android™
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Calendar Lock PEA

Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM.

California

California is a new calendar application for GNOME 3. It’s currently under heavy development.

Etar

Material design open source calendar for Android.
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GMinder

GMinder is an open source Windows System Tray app that pops up to remind you about Google Calendar events.

Kolab Community

Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.
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Kontact - KOrganizer

KOrganizer is the calendar and scheduling component of Kontact, the integrated personal information…

Lightning Calendar

Organize your life — it’s about time!
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Nextcloud Calendar

The Calendar app is a user interface for Nextcloud’s CalDAV server.
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Outlook

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Rainlendar

Rainlendar - Customizable desktop calendar

Simple Calendar

A simple calendar with events (optional recurring and reminders), week numbers and a customizable…

VueMinder Calendar

Take control of your schedule and get reminded wherever and however you want.