Feedbackify - Feedbackify offers website feedback solutions that enable companies to engage with their customers.
Crisp Chat - Multi-channel customer support software
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
Userlike - Userlike is free live chat software for website and mobile support.
csupport - cSupport offers Live Chat support. Ideal for small businesses and Entrepreneurs Worldwide.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.