History: CardDAV

http://en.wikipedia.org/wiki/CardDAV

https://github.com/Kickball/awesome-selfhosted/blob/master/README.md#calendar-and-address-books

http://www.inf-it.com/open-source/clients/infcloud/
InfCloud is an open source CalDAV/CardDAV web client implementation released under GNU Affero General Public License (version 3.0).

https://gitlab.awesome-it.de/kolab/roundcube-plugins  (CalDAV client for Roundcube)


http://dmfs.org/carddav/

http://googleblog.blogspot.ca/2012/12/winter-cleaning.html

http://evertpot.com/jcard-completed/

Related:

((Calendar Sync))

((SabreDAV))

https://unterwaditzer.net/2015/kill-webdav.html

https://github.com/etesync