Open Peeps - A hand-drawn illustration library.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
Control Illustrations - 108 free flat illustrations with customizable characters
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Craftwork - A collection of User Interface resources made by Craftwork
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.