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

QOwnNotes is a plain-text file notepad and todo-list manager with Markdown support and Nextcloud / ownCloud integration.

Task manager with Todoist, Nextcloud & CalDAV support designed for GNOME

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.

📇 Synchronize calendars and contacts.

📆 Calendar app for Nextcloud

Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.

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

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

Kurrier is a modern, self-hosted workspace for email, calendar, contacts and storage.

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

A CalDAV web client similar to Google Calendar

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

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

✅ Tasks app for Nextcloud

jtx Board allows you to manage your Journals (like meeting minutes), Notes and Tasks in one Android app. The app is compatible with the iCal standard (RFC5545) and is integrated with DAVx5 to allow the synchronisation of entries through CalDAV.

Bi-directional synchronization between services such as Taskwarrior, Google Calendar, Notion, Asana, and more

✅ Simple, standards-based, command line todo (aka: task) manager.

Manage My Damn Life (MMDL) is a self-hosted front end for managing your CalDAV tasks and calendars.