Open Source Self-Hosted Scheduling and Calendar Apps

Calendar interface for CalDAV, enabling cross-device event sync, web editing, recurring events, Nextcloud Contacts integration, WebCal support and attendee invites.

Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.

Feature rich event, group and time managment system.

Comprehensive CalDAV and CardDAV server enabling local or remote calendar and contact access with configurable authentication.

A shared agenda for local communities.

grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.

A simple, self-hostable group calendar. Feber is a single PHP file (+assets) that runs on virtually every webhost.

GRUP is an event scheduling app that allows you to create recurring events, invite friends, and keep track of their RSVPs.

The OX App Suite by Open-Xchange is web-based platform offering a suite of apps like an email client, calendar, contacts magement, cloud storage with synchronization and productivity apps for word processing, spreadsheets and presentations.

Appointment scheduling/booking application that aims to be super-simple, and open source!

OpenPaaS is an open, modern and business-oriented collaboration platform. Gorgeous on any devices, it ships with incredibly useful web applications, including a mail, a calendar and a contact app.

Web-based team collaboration suite with email, calendar, contact and project management, filesharing, CRM, trouble tickets, chat, and online office integration.

WebCalendar is a PHP-based calendar application that can be configured as a single-user calendar, a multi-user calendar for groups of users, or as an event calendar viewable by visitors.

Date picker formatter is an add-on for the Drupal CMS that provides similar features to the online service 'Doodle'.

Powerful and easy customizable PHP events calendar script for generating web calendar control. Easy to integrate with a variety of PHP projects.

Booking Commerce is SaaS-based Online booking and Appointment Scheduling software that ease your customer onboarding process and get your sales rolling. Now you can power your business using world's first online comprehensive platform for bookings.

jquery-calendar - A responsive jquery calendar scheduler built with bootstrap and moment.js

A minimalist daily planner that helps you focus on exactly one task at a time by combining your calendar, daily to-dos, and fast capture into a smooth, distraction-free workflow.

wtplan (web terminal planner ) helps you manage a calendar. The calendar can be managed from a command line interface and/or a web interface. The calendar data is stored in a simple text file. wtplan integrates with git to make backup and synchronization between multiple...

Bitpoll is a software to conduct polls about Dates, Times or general Questions.

Afterlogic Aurora is an enterprise collaboration system for small and medium-sized business. Aurora provides collaboration of webmail, contacts, calendar, files and helpdesk modules.