DAViCal

Simple calendar and contact server with extremely low administrative overhead.

Lightweight CalDAV and CardDAV server based on sabre/dav.

Open source CardDAV, CalDAV, and WebDAV framework and server.

Calendar syncing tool that pulls and pushes events between calendar sources and destinations via iCal/ICS or OAuth, with support for anonymized busy/free events.

POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client with an Exchange server, even from the internet or behind a firewall through Outlook Web Access.

A simple, dockerizable and fully translatable admin interface for sabre/dav based on Symfony 5 and Bootstrap 4, largely inspired by Baïkal.