Chattp - Chattp is the software that simply converts your page into chat by augmenting the browser Windows.
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
JabbR - A chat application built with ASP.NET and SignalR.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
OpenPalace - OpenPalace is an open-source platform that is used to chat in a 2D graphical way by selecting any avatar.
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.