100AM - Next gen business cards: always up-to-date, bright design
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Haystack - Your new business card.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
PING - PING (Partimage Is Not Ghost) is a free software Linux-based live CD ISO built upon the partimage...
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.