Browse free open source Calendar apps and projects for Android below. Use the toggles on the left to filter open source Calendar apps by OS, license, language, programming language, and project status.
A simple calendar with events, customizable widgets and no ads
professional CRM and groupware service, ready for the cloud
Replacement for the Java date and time classes prior to Java SE 8
Date Picker Calendar extension for OpenOffice Calc
private digital diary & note taking appliaciton
Android calendar app focusing on a good view of a month.
A beautiful Kotlin app to remember birthdays and events
Android widget, counting days before certain events
A beautiful material calendar with endless scroll, range selection
Customizable React-Native calendar components
Prayer Times for iPhone and Android built-in Calendar
Android Simplified Episode Remainder System
Free, open-source Human Capital Management system
A React-Native datetime-picker for Android and iOS
Open-source Property Management System (PMS)