Etar - OpenSource Calendar

Etar is a material designed open source calendar, for everyone!GPL-3.0-only

Tuta Calendar

Quantum-safe encrypted planner to schedule & manage your events & sync calendarsGPL-3.0-or-later

Taswast

Amazigh CalendarGPL-3.0-only

Medical Calendarlog

Privacy-focused medical event tracking using your device's calendar systemGPL-3.0-or-later

Month Calendar Widget

Calendar widgetApache-2.0

Kolab Client

Sync contacts/calendarGPL-3.0-only

Month Calendar Widget

Calendar widget of the current monthApache-2.0

French Calendar

French Revolutionary calendar widgetGPL-3.0-only

Birthday Calendar

Creates birthday events from all other calendar's dataGPL-3.0-only

Polite Droid

Calendar toolGPL-3.0-only

MinCal Widget

Minimal Calendar WidgetBSD-3-Clause

Calendar Import-Export

Import, Export & Backup your calendars using ics filesGPL-3.0-only

Calendar Trigger

Trigger actions on calendar eventsGPL-3.0-or-later

Tacere

Silence phone on calendar eventsBSD-3-Clause

EteSync - Secure Data Sync

Secure, private and end-to-end encrypted calendar, contacts and tasks syncGPL-3.0-only

NoFb Event Scraper

Import Facebook-Events to the calendarGPL-3.0-only

Birthday Adapter

Birthday Calendar AdapterGPL-3.0-only

CalEF (Calendar Entry Formatter)

Create and send Appointment-Confirmation-Message from Android-Calendar-Entry.GPL-3.0-or-later

Infomaniak kSync

Automatically sync your contacts and calendarsGPL-3.0-only

ICSx⁵

Subscribe to Webcal (.ics) calendarsGPL-3.0-only