Radicale

A CalDAV calendar and CardDav contact server

Radicale is a server for CalDAV (calendars, to-do lists) and CardDAV (contacts). * Shares calendars and contact lists through CalDAV, CardDAV and HTTP. * Supports events, todos, journal entries and business cards. * Works out-of-the-box, no setup or configuration required. * Can limit access by authentication. * Can secure connections with TLS. * Works with many CalDAV and CardDAV clients. * Stores all data on the file system in a directory structure. * Can be extended with plugins.