Comparison of CalDAV and CardDAV implementations

A comparison of CalDAV and CardDAV implementations offers two overviews of client and server computer software implementations of the CalDAV and CardDAV protocols.

Client implementations
There are more clients, mentioned for completeness:
 * For the command line: Vdirsyncer (for WebDAV) + Khal (for calendaring) or + Khard (for contacts)
 * Apple's iCal and Calendar
 * For Windows and Mac eM Client
 * Windows built in-support (kind of)
 * For the Web: Kronolith
 * For Android: CalDAV Sync, CardDAV Sync, iCal Import/Export CalDAV

Server implementations
The table is missing Kopano, Kerio Connect and Scalix, which are mentioned here for completeness.