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Radicale – small but powerful CalDAV and CardDAV server

Radicale is a compact server for synchronising calendars, task lists, journals and contacts using CalDAV and CardDAV. It is designed for installations where a dedicated DAV service is preferable to deploying a much larger groupware platform.

The server can operate with a small configuration and stores its collections directly on the filesystem. Calendar and contact editing is left to DAV clients rather than being duplicated in a full browser-based organiser.

This is free and open source software.

Key Features

  • Shares calendars, task lists, journal entries and address books with compatible CalDAV and CardDAV clients.
  • Collection sharing can map calendars and address books to other users with separately controlled read and write permissions.
  • Sharing rules can target individual users, groups or authentication realms, allowing common collections to be exposed without duplicating their contents.
  • Token-based sharing can make selected collections available without requiring the recipient to authenticate with a normal user account.
  • Authentication options include htpasswd credentials and integration with authentication performed by a trusted web server or reverse proxy.
  • Configurable rights backends determine which users may read, write or manage particular collection paths.
  • The default storage backend keeps collections in a straightforward filesystem hierarchy rather than requiring an external SQL database.
  • Authentication, authorisation, storage and web components can be replaced or extended through Python plugins.
  • TLS can be handled by Radicale itself, while deployments can alternatively place the service behind a suitable reverse proxy.
  • Connection, resource-size and failed-authentication limits provide controls for exposed installations and help contain abusive requests.

Website: radicale.org
Support:
Developer: Kozea, Unrud, Peter Bieringer and contributors
License: GNU General Public License v3.0

Radicale is written in Python. Learn Python with our recommended free books and free tutorials.


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BaïkalLightweight CalDAV and CardDAV server with a web admin interface
XandikosGit-backed CalDAV and CardDAV server with scheduling support
DAViCalPostgreSQL-backed CalDAV server focused on standards interoperability

Read our verdict in the software roundup.

CardDAV Servers
sabre/davCreate WebDAV, CalDAV and CardDAV servers
RadicaleSmall but powerful CalDAV and CardDAV server
DavisCalDAV, CardDAV and WebDAV server with web administration
BaïkalExtensive web interface managing users, address books and calendars
XandikosLightweight and complete CardDAV/CalDAV server
DAViCalCalDAV server for sharing calendars and managing access rights

Read our verdict in the software roundup.


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