FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Clearbit - Clearbit provides Business Intelligence APIs
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Memotoo - Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..
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.
Eyecon - Download Eyecon for free to improve your Android or iPhone phone dialer for more beautiful contacts and better communication.