Included with Mac OS X 10.6
Desktop client for Mac OS X that supports CardDAV. Also provides CardDAV-based auto-complete to other apps via built-in APIs.
Included with iOS 4
Client for iPhone/iPod Touch that supports CardDAV.
Included with Atmail 6 Product PHP/Zend Email Server with jQuery browser based WebClient
Supports CardDAV to list, view, edit contacts directly on the server. Server contacts and CalDAV calendar syncing with ActiveSync to iOS and downloadable Outlook Add-in. Free Trial Available.
Commercial/Outlook plug-in
The WebDAV Collaborator is a powerful plug-in for synchronizing your CalDAV calendar and/or CardDAV contact data to Outlook.
Android sync adapter
CardDAV-Sync is a sync adapter for Android devices that synchronizes contacts via CardDAV. See for ratings.
Available in free and purchased editions
Open Source CardDAV client
Desktop open source client (Javascript+jQuery) for CardDAV.
Android sync adapter
ContactSync is an Android app which syncs your
Android contacts with FTP, HTTP, WebDAV, CardDAV servers and plain vcard files. It also provides a lot of additional features.
Commercial Cloud-based Contact Manager with CardDAV support
Contactzilla is a commercial cloud-based contact manager which supports CardDAV.
Open Source/Android Sync Adapter
DAVdroid is a professional open-sourc synchronization adapter that combines CalDAV and CardDAV into one Android+ app. It offers two-way sync, integrates seamlessly into the device and is aimed at easy setup and simplicity.
Desktop client for Windows (.NET) supports CardDAV.
EVO Collaborator for Outlook (ECO) enables users to take advantage of CardDAV for Contacts and CalDAV for Calendars and Tasks. Synchronization of both Contacts, Calendars and Tasks occurs whenever changes are made. By supporting iCloud, Gmail, fruux, Yahoo! (read-only) and AOL (read-only), users easily import what they have on cloud. Yet, C2C (Cloud to Cloud) feature facilitates duplicating your contacts and calendars from one place to another; O2C (Outlook to Cloud) feature gives you an option saving your data elsewhere on the Cloud.
Contact Manager
Emacs BBDB3 is a contact manager supporting CardDAV.
E-mail program
Evolution is an e-mail program which supports CardDAV.
Free Outlook plug-in
The fruux Outlook Connector is a free plug-in for synchronizing Outlook contacts and calendars with fruux via CalDAV and CardDAV.
Commercial Outlook CalDAV/CardDAV Sync
gSyncit V4.2 offers CalDAV calendar/task sync and CardDAV sync for Outlook, in addition to a number of other features.
Open Source CalDAV/CardDAV web client
InfCloud is an open source CalDAV/CardDAV web client (integrated version of CalDavZAP and CardDavMATE). Demo at
Open Source/Cross-platform
Desktop client that supports CardDAV.
Client and Server
OwnCloud is a web client and a server supporting CardDAV.
Open Source CardDAV client
PHP CardDAV Client.
Python CardDAV client and library
pyCardDAV is a CLI CardDAV client (for use with mutt etc.) and also contains a reusable CardDAV module.
Open Source CardDAV plug-in
Open source CardDAV plug-in for Roundcube Webmail.
Free/Thunderbird Plugin
Plugin for Thunderbird address books which allows CardDAV subscriptions.
Commercial Outlook/CalDAV and CardDAV Sync
SurGATE Outlook Sync Client provides two-way calendar and contacts sync between Outlook and CalDAV/CardDAV Servers.
Android Sync Adapter +
An Android app that is more powerful than a simple sync adaptor: it allows linking any local device contacts account (including 3rd-party accounts) with any CardDAV address book.