Typecard - The free and easy way to create your digital business card
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
HiHello - Exchange contacts, seamlessly.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Blinq.me - Create your free digital business card in seconds. Recipients don’t need the Blinq app to receive your card. Raise your networking game today.
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.