CardDAV-Sync is a CardDAV client for Android to synchronize contacts with a remote server. Due to its implementation as sync adapter it integrates seamlessly with the default contacts app.
It uses DAV based protocols instead of syncml. It integrates with several groupdav/carddav serves. For a list of compatible servers look at: http://dmfs.org/wiki/index.php?title=Supported_servers_%26_services.
Paid version with more features is available on the android market.
My test has been made with egroupware server 1.8
Please report here any other useful info or mistake about this application