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
MirrorFly - World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises
LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.
echofin - Echofin helps communities grow, engage and monetize their following in ways no other platform has done so far.
Crisp Chat - Multi-channel customer support software
chatwee - Group chat app for online communities. Used wherever visitor interaction and engagement are key to the site's functioning.