Smooch.io for WhatsApp - Engage with your customers on WhatsApp like never before
BetterChat for WhatsApp - Gorgeous new full-featured WhatsApp client for the Mac.
WhatsApp for LiveChat - Let your customers reach you via Whatsapp
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.
WhatsApp Chat for Shopify - Convert website visitors into customers with WhatsApp Chat
Number To Whatsapp - A utility tool which lets your start a Whatsapp conversation without saving the contact of the said person first.