coComment

coComment is a service for managing, powering and researching conversations online.

Commentar

Commentar is a self hosted open source commenting system which can easily be integrated into any…

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.

A native WordPress Disqus alternative with a focus on speed and privacy: 100% realtime native…

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

HTML Comment Box widget for your website. Copy the HTML code and it just works!

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.

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

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

RbComment - Zend Framework 2 module for drop-in, self-hosted comments, with email notifications…

Powering the Realtime Social Layer for Entertainment, Local Media and High Traffic Blogs.

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

jskomment is an open source commenting system that is built on javascript and AJAX.

talkatv is an open source comment service much like …