WhatsApp Web - A WhatsApp client for web
Smooch.io for WhatsApp - Engage with your customers on WhatsApp like never before
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.
StackWhats - Add the WhatsApp Live Chat to your website
Number To Whatsapp - A utility tool which lets your start a Whatsapp conversation without saving the contact of the said person first.
WhatsApp Chatbots by SendPulse - No-code chatbots and shared inbox for WhatsApp