uhChat - uhChat is a chat window software that can be integrated into any website.

tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page

Chatroll - Chatroll is the leading provider of interactive tools for social publishers.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.

Live800 - Live800 is an enterprise-grade Live Chat and Customer Service platform that enables businesses to provide instant support to their customers through a variety of channels, including Live Chat, Email, Phone, and Social Media.