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™
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.
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.
Kontact - KOrganizer
KOrganizer is the calendar and scheduling component of Kontact, the integrated personal information…
Lightning Calendar
Organize your life — it’s about time!
Nextcloud Calendar
The Calendar app is a user interface for Nextcloud’s CalDAV server.
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.