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.
Haystack - Your new business card.
Google Calendar - Spend less time managing your day & more time enjoying it
PING - PING (Partimage Is Not Ghost) is a free software Linux-based live CD ISO built upon the partimage...
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
HiHello - Exchange contacts, seamlessly.