Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
AkrutoSync - Sync your Outlook contacts, calendar, tasks and notes on your PC direct with your phone via Wi-Fi or a cellular network.Buy · FAQ · Contact Us · SupportPeople also askWhat is Akrutosync?
Drupe - Next generation contact manager and dialer.
DAVx5 - DAVx5 is a CalDAV/CardDAV management and sync app for Android.
Simple Contacts - Contact lens prescriptions from home
EteSync - Secure, end-to-end encrypted and journaled personal information synchronization.