Update: 21-09-16

HappyFox Chat

@A0GAW4S5P-happyfox-chat

HappyFox Chat is the next generation free live chat software for websites, that will help you to provide the best customer support and convert more sales. Built on a high performance technology stack, HappyFox Chat offers an amazing user experience and integrates with third party apps that you already use.
It's free for up to 10 support agents and installs in less than 2 minutes! With free Slack integration, you'll be able to accept chat requests on your website, right from Slack and get notifications of all chats going on.
Features: Concurrent chats, Canned responses, Chat transfer, Free App integrations, Chat history, Amazing UI.