FoCal
FoCal enables you to create your personal photo calendarGPL-3.0-or-later
PolyCal
colorful, text-based calendar widgetGPL-2.0-only
Polite Droid
AgendaGPL-3.0-only
Taswast
Calendrier amazighGPL-3.0-only
KashCal
Modern Android calendar. iCloud & CalDAV finally done right. Private. Open.Apache-2.0
MinCal Widget
Minimal Calendar WidgetBSD-3-Clause
Clock31
Clock + Calendar combo widget for AndroidGPL-3.0-only
Goals Tracker 24/7 - timeto.me
Goals, checklists, tasks, repetitive tasks, calendar and 24/7 time tracking.GPL-3.0-or-later
Kolab Client
Synchroniser les contacts / le calendrierGPL-3.0-only
My Brain
Productivity app for Tasks, Notes, Calendar, Diary, Bookmarks and moreGPL-3.0-only
Elements
Chinese zodiac five elements as a pageable calendarMIT
Medical Calendarlog
Privacy-focused medical event tracking using your device's calendar systemGPL-3.0-or-later
Suntimes Calendars
A calendar provider add-on for Suntimes.GPL-3.0-or-later
EteSync - Secure Data Sync
Secure, private and end-to-end encrypted calendar, contacts and tasks syncGPL-3.0-only
Valentin's PowerTools #036 - Ease The Waiting
A mix between a calendar and a clock that makes you wait faster.GPL-3.0-only
NoFb Event Scraper
Import Facebook-Events to the calendarGPL-3.0-only
Broccoli: The Green Recipe App
Recipe manager, cooking assistant, seasonal calendar: the eco-friendly cookbook.GPL-3.0-only
Linwood Flow Nightly
Feature rich event, group and time management systemAGPL-3.0-only
Holidayz
Public and Regional Holidays for 100+ CountriesGPL-3.0-only
OneTimeAlarm
Alarm reminders which delete themselves automatically after firing. GPL-3.0-or-later