Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Crisp Chat - Multi-channel customer support software
GoSquared Live Chat - Beautiful, simple, and free live chat for your website
Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.
Drift - A messaging app that helps you grow your business.