SmartComment

SmartComment is a web-based software for public comments and outreach campaigns.

Cackle

Cackle offers widgets for live chat and to collect reviews, comments, and polls.

CommentLuv provides plugin that enables readers to post their comments.

Commentbox is a jsf component that allows quick realization of a comment functionality

Commentics is an advanced PHP comment script with many features.

A fast, bloat-free comments system to foster discussion on your website

Disqus is a global comment system that improves discussion on websites and connects conversations across the web.

Facebook comments plugin lets people comment on content on the site using their Facebook account.

Add modern discussion and social interactions to your website

HyperComments offers tailored comment system for websites.

IntenseDebate’s comment system enhances and encourages conversation on your blog or website.

Isso – Ich schrei sonst – is a lightweight commenting server written in Python and JavaScript.

JLex Comment is a comment system for Joomla.

Easy to set up, ad-free and reliable comment system

LiveRe provides comment management and content response solutions.

Master Comments System is a very compact comments system with basic options:

Remarkbox offers a free comment system to keep readers engaged with your content.