CardDAV Clients

Free Software

 * Evolution supports CardDAV native
 * Thunderbird
 * work on native support has not started
 * SoGo Connector provides CardDAV for Thunderbird
 * CardBook provides an enhanced address-book, manages all contacts under the VCard standard, and synchronizes with CardDAV.
 * Outlook:CardDAVSyncOutlook - Outlook address book synchronization with CardDAV
 * Roundcube Webmail: Roundcube CardDAV-Plugin - Open source Roundcube Webmail CardDAV-Plugin
 * CardDavMATE - Open source web CardDAV client / HTML5 Javascript+jQuery web application (compatible with Safari, Webkit, Chrome and Firefox)* kcarddav - Not working
 * Python package: pyCardDAV - - Open source Python CardDAV client library
 * PHP module: PHP CardDAV-Plugin - Open source PHP CardDAV client library

Mobile - Android

 * DAVdroid – open-source CalDAV/CardDAV sync adapter for Android 4 or newer
 * CardDav Sync Free

Non-free Software

 * Apple Address Book (MacOS 10.5 and higher)
 * iOS Contacts App (iPhone, iPad, iPod touch)
 * iCal4OL 2.10.0 does support CardDAV for DAViCal >= 0.9.9.3
 * eM Client 3 - cost free for individuals, Windows only.
 * CardDav-Sync beta for Android
 * cFos Outlook DAV Cloud synchronisation of your Outlook calendar, tasks, and contacts (nonfree)