Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.
Green Messenger - WhatsApp Messenger Web for Chrome. Text/Chat on computer. Notifications, messages, tools.
Investis - Investis helps companies to use digital channels to increase revenue, enhance employee engagement and influence corporate audiences.
WhatsApp Web To Go - WhatsApp Web client for your phone/tablet with media support
Sameroom - Chat interoperability-as-a-service
App for WhatsApp by coldX - Integrated WhatsApp functionality on the Desktop.