WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
FullContact Card Reader - Automagically scan biz cards into LinkedIn/Gmail contacts
FastAd Market - Advertise on any social media platform using just one Ad. Make money when you share other Ads on the timeline.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Messenger Day by Facebook - Share your day in Messenger
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.