Wammu - Wammu is a mobile phone manager using Gammu as its backend.
fruux - Free service that takes care of your contacts, calendars and more so you don't have to.
Nokia PC Suite - Nokia PC Suite is the software that is used to manage the files and operation of the Nokia mobile phones by connecting the mobile with the Microsoft Windows operating system.
FullContact - Put the power of full contact information into your web or mobile apps.
OxyFile - Oxygen Forensics - Mobile forensic software for cell phones, smartphones and other mobile devices
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.