RbComment

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

Commentar

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

Commentics

Commentics is an advanced PHP comment script with many features.

Commento

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

DISQUS

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

Echo

Golang HTTP server framework

Facebook Comments

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

HTML Comment Box

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

Instacomment

A free comment service allowing website owners to instantly add a comment system to any website or blog.

IntenseDebate

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

Isso

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

JustComments

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

Juvia

A commenting server similar to Disqus and IntenseDebate

Master Comments System

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

Pheramor

A dating app based on genetic compatibility í ½í²

Pubble

Pubble is a community engagement platform that brings the social web to your site. Change how you interact with your audience while continually enhancing your web site.

Remarkbox

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

Ruby on Rails

Ruby on Rails is an open source full-stack web application framework for the Ruby programming…

coComment

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

jskomment

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