18 projects
Cal.com
Cal.com is an open-source scheduling infrastructure and meeting scheduling platform that allows users to share their availability and coordinate meetings. It provides customizable booking pages, calendar integrations, and automated scheduling workflows for individuals and organizations.
Contributors
7,694
Organizations
1,284
Software value
$41M
Nextcloud Calendar
A calendar application for Nextcloud that provides personal calendar management and scheduling functionality, allowing users to create, edit and share calendars within the Nextcloud platform.
Contributors
2,967
Organizations
536
Software value
$4.6M
Etar Calendar
Android open source calendar
Contributors
1,785
Organizations
221
Software value
$3.1M
Simple Calendar
Simple Calendar is an open-source Android calendar application focused on providing essential calendar functionality with a clean, minimalist interface. It offers features like event management, recurring events, daily/weekly/monthly views, and customizable widgets while maintaining privacy by working offline without requiring unnecessary permissions.
Contributors
1,591
Organizations
195
Software value
$1.3M
Radicale
A simple CalDAV (calendar) and CardDAV (contact) server.
Contributors
1,523
Organizations
357
Software value
$614K
Easy!Appointments
:date: Easy!Appointments - Self Hosted Appointment Scheduler
Contributors
1,356
Organizations
166
Software value
$3.7M
MeetingBar
MeetingBar is a macOS menu bar app that displays upcoming calendar meetings and provides quick access to join various video conferencing platforms directly from the menu bar. It supports multiple calendar services and meeting platforms like Zoom, Google Meet, and Microsoft Teams.
Contributors
912
Organizations
278
Software value
$266K
gcalcli
gcalcli is a command-line interface tool for Google Calendar that allows users to manage their calendar events and tasks from the terminal. It enables viewing, adding, editing, and deleting calendar events without using the web interface.
Contributors
777
Organizations
198
Software value
$258K
DAVx⁵
DAVx⁵ is an open-source CalDAV/CardDAV suite and sync app for Android. You can also access your online files (WebDAV) with it.
Contributors
749
Organizations
131
Software value
$2.7M
Android Persian Calendar
An open-source Persian calendar application for Android devices that provides date conversion, widgets, and Persian calendar functionality with support for Iranian holidays and events
Contributors
683
Organizations
41
Software value
$1.9M
Elementary Calendar
Elementary Calendar is a desktop calendar application for the elementary OS Linux distribution. It provides a clean, modern interface for managing events, appointments, and schedules while integrating with the elementary OS design language and ecosystem.
Contributors
564
Organizations
66
Software value
$425K
Rallly
Rallly is an open-source scheduling and collaboration tool designed to make organizing events and meetings easier.
Contributors
518
Organizations
137
Software value
$3.4M
sabre/vobject
A PHP library for parsing and manipulating iCalendar and vCard files, providing functionality to read, write, and manipulate these common data formats used for calendar events and contact information
Contributors
321
Organizations
90
Software value
$1M
Libical
Libical is an open source implementation of the iCalendar protocols and data formats. It provides a library for parsing, generating, and manipulating iCalendar data, supporting both C and C++ interfaces.
Contributors
252
Organizations
99
Software value
$3.2M
SOGo
SOGo is an open-source groupware server that provides collaborative calendar, mail, and address book management. It offers a modern web interface and supports multiple protocols including CalDAV, CardDAV, and IMAP.
Contributors
248
Organizations
49
Software value
$6.8M
Open Web Calendar
Open Web Calendar is a web application that embeds calendar feeds from iCal/ICS sources into websites, allowing users to display and share calendar events through an iframe or direct URL. It supports multiple calendar sources, customizable styling, and interactive viewing options.
Contributors
203
Organizations
30
Software value
$756K
Hebcal
Hebcal is a Jewish calendar and holiday calculation software that converts between Hebrew and Gregorian dates, generates candle lighting times, and provides information about Jewish holidays, Torah readings, and other religious observances.
Contributors
186
Organizations
26
Software value
$164K
EGroupware
EGroupware is an open-source enterprise collaboration and groupware solution that provides integrated tools for communication, project management, calendar sharing, contact management, and document handling. It offers a web-based interface for teams to manage tasks, share resources, and coordinate activities across an organization.
Contributors
156
Organizations
14
Software value
$16M