All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

A simple CalDAV (calendar) and CardDAV (contact) server.

DAVx⁵ is an open-source CalDAV/CardDAV suite and sync app for Android. You can also access your online files (WebDAV) with it.

A third-party, open-source ProtonMail CardDAV, IMAP and SMTP bridge

📇 Synchronize calendars and contacts.

Sync Outlook with Google, SOGo, Nextcloud or any other CalDAV/CardDAV server

[Thunderbird Add-On] Central user interface to manage cloud accounts and to synchronize their contact, task and calendar information with Thunderbird

Docker image for Radicale calendar and contact server 📆 + security 🔐 + addons 🚀

DavMail POP/IMAP/SMTP/Caldav/Carddav/LDAP Exchange and Office 365 Gateway - Synced with main subversion repository at

📇 Contacts app for Nextcloud

A CalDAV/CardDAV server backed by Git

🗓 A modern, simple, feature-packed, fully translatable admin interface for sabre/dav based on Symfony 7 and Bootstrap

A Go library for WebDAV, CalDAV and CardDAV

This is a CalDAV and CardDAV adapter for EteSync

WebDAV, CALDAV, and CARDDAV client for Nodejs and the Browser

a calendar server aiming to be simple, fast and passwordless

Milton Java WebDAV / CalDAV / CardDAV Server Library that runs on Windows, Mac, Linux, Android and iOS.

Tine 2.0 main repository

WebDAV Push: Draft

📓 A command-line PHP script allowing to import CardDAV-based VCards (e.g. from 'owncloud') to a phonebook in a AVM FRITZ!Box