Baïkal : Baïkal offers ubiquitous and synchronized access to your calendars and address books over CalDAV and CardDAV. Baïkal implements the current IETF recom...
Mail-in-a-Box : Each Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software. It also includes contacts and calen...
Riot : Riot allows teams to communicate across a wide range of collaboration apps. If some team members use Riot while others use IRC, Slack or Gitter, Riot ...
pump.io : Social server with an ActivityStreams API. It's a stream server that does most of what people really want from a social network.
The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
