A reliable, customizable and privacy-focused serverless comment system with no coding required. Top features:
DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
Surfly - Simple, Fast, and Secure Co-browsing
Commento - A fast, bloat-free comments system to foster discussion on your website
DivShow - Extremely easy way to build product walkthroughs on your web pages!
Hyvor Talk - The Best Commenting Platform For Your Website
Copointer.com - Copointer is technology for co-browsing on your website, that will help to improve your customer support and to be on the same page with your client.