MyPhoneExplorer - WHAT IS MY PHONE EXPLORER? Imagine if your PC could be used to keep track of your mobile phone? How would you utilize a PC client that connects to your phone? Read more about MyPhoneExplorer.
fruux - Free service that takes care of your contacts, calendars and more so you don't have to.
Wammu - Wammu is a mobile phone manager using Gammu as its backend.
FullContact - Put the power of full contact information into your web or mobile apps.
gnokii - "gnokii" is the name of a project that aims to develop tools and drivers for the mobile...
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.