Baikal is a lightweight CalDAV and CardDAV server. It is compatible with the calendar and contacts apps from Apple's iOS and OS X, Android, Evolution, Mozilla Thunderbird, and any other CalDAV/CardDAV capable application. Baikal supports authentication with multiple users and calendars, and comes with a spiffy web-based administration interface. Baikal does not start a daemon or open any ports. It must run at the root of a VirtualHost or subdomain. See the included sample Apache and Nginx configurations, and INSTALL.md for all the gory details. WWW: http://sabre.io/baikal/