vCard Extensions to WebDAV (CardDAV) is an address book client/server protocol designed to allow users to access and share contact data on a server.
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The following products implement the server-side portion of the CardDAV protocol:
- Apple Contacts Server.
- Atmail, a email and groupware server, supporting the CardDAV protocol.
- Baïkal, a lightweight CalDAV + CardDAV server
- CommuniGate Pro supports CardDav protocol.
- DAViCal supports CardDAV from version 0.9.9.2
- ContactOffice online collaboration suite supports CardDAV.
- Contactzilla allows access to user's address books via CardDAV.
- EVO Mail Server, a mail server software, supporting CardDAV
- fruux, a synchronization service, supporting CardDAV
- GMail and Google Contacts allow access to user's address book via CardDAV.
- Group-Office, an open-source groupware and CRM application
- Horde Groupware, a complete web-based groupware solution with CalDAV and CardDAV support.
- IT Hit Active Directory Address Book CardDAV Server Enables management to Active Directory contacts and users via CardDAV protocol.
- IT Hit WebDAV Server Engine for .Net a WebDAV sever library for .Net with CardDAV support.
- Meishi, a standalone, Ruby on Rails based CardDAV server
- Memotoo, a synchronization service, supporting CardDAV
- Oracle Communications Contacts Server
- ownCloud supports CardDAV protocol since version 2.0.
- Radicale, open source CalDAV CardDAV server written in Python
- SabreDAV, a WebDAV framework for PHP, supports CardDAV since version 1.5.
- SOGo supports CardDAV access to its address books.
- sync•gw allows synchronization of any address book using CardDAV.
- Zimbra 6 allows access to its address book via CardDAV.
- SYNOLOGY DSM 6.0 supports CardDAV.
The following products implement the client-side portion of the CardDAV protocol:
- Apple Contacts starting from Mac OS X Snow Leopard and higher.
- Apple iOS, starting from iOS 4.
- Atmail supports a complete CardDAV client via a Webmail and mobile interface
- BusyContacts for OS X El Capitan or later
- Bynari WebDAV Collaborator, a plug-in for synchronizing CalDAV and CardDAV data to Outlook with most DAV servers.
- Blackberry devices running QNX - Blackberry 10+ phones, Playbook OS 2.0+ tablets
- CardDav-Sync for Android
- CardDAV PHP, open source PHP CardDAV Client
- ContactSync for Android
- Contacts CardDAV Sync 2 Cloud for Android
- DAVdroid for Android 4+
- EVO Collaborator for Outlook, sync Outlook contacts, calendars and tasks with CardDAV and CalDAV servers
- Evolution - Works as WebDAV contacts.
- KDE Software Compilation 4.5 will feature CardDAV client support, due in August 2010. It will be available for use by Kaddressbook, which is part of Kontact PIM suite. It will be provided by Akonadi: a PIM server which will also make the data available to other applications.
- Kerio Connect
- Outlook CalDav Synchronizer (open source) adds CalDAV and CardDAV support to Microsoft Outlook
- Sailfish OS, the OS of the Jolla phones and tablet (since 2015)
- SurGATE Outlook Sync Client, supports a complete CardDAV and CalDAV client for Outlook
- Thunderbird, via the SOGo Connector or the CardBook add-on 
- Comparison of CalDAV and CardDAV implementations
- Exchange ActiveSync
- "CardDAVResources". CalConnect. Retrieved April 10, 2010.
- "CardDAV: Related Standards". CalConnect. Retrieved April 11, 2010.
- "Implementations: CardDAV Servers". CalConnect. Retrieved April 10, 2010.
- "Mac OS X Server: Address Book Server". Apple. Retrieved April 10, 2010.
- "Baïkal lightweight CalDAV+CardDAV server". Retrieved December 11, 2013.
- "CommuniGate Pro support of CardDav". Retrieved April 21, 2011.
- "DAViCal release 0.9.9.2". Freshmeat. Retrieved September 24, 2010.
- "Contact synchronization using CardDAV". Retrieved March 3, 2014.
- "ZillaSync: Get your contacts on the move with CardDAV". Contactzilla. Retrieved December 17, 2013.
- Ellingson, Jeff (September 27, 2012). "A new way to sync Google Contacts". Google. Retrieved September 27, 2012.
- Horde Groupware
- "Meishi". GitHub. Retrieved March 30, 2012.
- Oracle Communications Unified Communications suite
- "Radicale Website". Retrieved April 4, 2014.
- "SabreDAV 1.5 released with CardDAV support". dmfs. Archived from the original on September 26, 2011. Retrieved September 11, 2011.
- "SOGo: Features". Inverse Inc. Archived from the original on 2013-03-05.
- "sync•gw". www.syncgw.com.
- Yoon Lee, Jong (September 25, 2009). "Zimbra Server: CardDAV server". Zimbra/VMWare Inc. Retrieved April 24, 2010.
- AEM (September 2014). "Synology DSM: CardDAV server". SYNOLOGY.
- "Implementations: CardDAV Clients". CalConnect. Retrieved April 10, 2010.
- Eran Dilger, Daniel (June 25, 2010). "iPhone 4 and iOS vs. Android: desktop and cloud services". AppleInsider. Retrieved July 24, 2010.
- "Atmail Client: CardDAV interface". Atmail. Retrieved May 26, 2010.
- http://www.bynari.net/products-page/product-category/bynari-webdav-collaborator/[permanent dead link]
- "CardDavMATE". Ján Máté. Retrieved March 8, 2013.
- "CardDav-Sync". Marten Gajda. Retrieved November 1, 2012.
- "CardDAV PHP". Christian Putzke. Retrieved October 23, 2012.
- Contacts CardDAV Sync 2 Cloud
- "DAVdroid". bitfire web engineering. Retrieved January 25, 2014.
- "CalDAV/CardDAV Support for Outlook 2007-2013". EVO software production.
- "InfCloud". Ján Máté. Retrieved March 18, 2015.
- Koenig, Tobias (February 4, 2010). "CalDAV/CardDAV/GroupDAV Support for Akonadi". Blogspot. Retrieved April 24, 2010.
- "Kerio Connect". Kerio Technologies. Retrieved April 10, 2010.
- Outlook CalDav Synchronizer
- "CalDAV/CardDAV Support for MS Outlook". SurGATE Labs.
- "SOGo: Frontends". Inverse Inc. April 17, 2013. Archived from the original on October 5, 2013. Retrieved October 4, 2013.
- "CardBook :: Add-ons for Thunderbird". Retrieved June 30, 2016.