Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Commento - A fast, bloat-free comments system to foster discussion on your website
LiveAgent - LiveAgent is a fully-featured web-based live chat and help desk software. It harnesses the power of a universal inbox, real-time live chat, built-in call center, and a robust customer service portal. Start your free 1 month trial today!
Commentbox - Commentbox is a jsf component that allows quick realization of a comment functionality