HashOver 2.0 - PHP based Comment System

•    PHP

HashOver is a PHP comment system intended as a replacement for services like Disqus. HashOver adds a "comment section" to any website, by placing a few simple lines of JavaScript or PHP to the source code of any webpage. HashOver is a self-hosted system and allows completely anonymous comments to be posted, the only required information is the comment itself.

talkatv - An open source commenting system

•    Python

talkatv is a comment service much like DISQUS or IntenseDebate. talkatv is embedded on any page and uses XMLHttpRequest level 2 and Cross-Origin Resource Sharing to post the comment back to the server.

Juvia - A commenting server similar to Disqus and IntenseDebate

•    Ruby

Juvia is an open source commenting system. It allows you to outsource your commenting needs to an external system so that you don't have to build your own commenting system for each website or each web app. Embedding a Juvia commenting page only involves pasting a JavaScript snippet into your web page.

Isso - a Disqus alternative

•    Python

Isso is a lightweight commenting server similar to Disqus. It allows anonymous comments, maintains identity and is simple to administrate. It uses JavaScript and cross-origin ressource sharing for easy integration into (static) websites.

Cusdis - Open source, lightweight (~5kb gzip), privacy-friendly alternative to Disqus

•    Typescript

Open source, lightweight (~5kb gzip), privacy-friendly alternative to Disqus. It is not designed to be a complete alternative to Disqus. It's aim is to implement a minimalist and embeddable comment system for small websites (such as your static blog).

Mouthful - Self-hosted alternative to Disqus

•    Go

Mouthful is a lightweight commenting server written in GO and Preact. It's a self hosted alternative to disqus that's ad free. It supports multiple database support(sqlite, mysql, postgres, dynamodb), Server side caching to prevent excessive database calls, Rate limiting, Honeypot feature, to prevent bots from posting comments, Migrations from existing commenting engines(isso, disqus) and lot more.

Talkyard - Forum software, brings together the best from StackOverflow, Discourse, Slack, Reddit, Disqus

•    Scala

Talkyard is a Forum software, brings together the best from StackOverflow, Discourse, Slack etc. It helps people find help "instantly", in Question & Answers topics, Discuss, upvote and choose the right things to do. It also provides support to do team chat, Add embedded comments to the blog.

disqus - A Ruby library for the Disqus commenting API and Javascript widgets.

•    Ruby

The Disqus Gem helps you easily integrate the Disqus commenting system into your Ruby-based website. It includes a Ruby wrapper for Disqus's REST API, and views helpers to generate their Javasript widgets. See the Disqus::Api class for more info on the Disqus API. You can also read the Disqus developer info here.

remark - comment engine

•    Go

Remark42 is a self-hosted, lightweight, and simple (yet functional) comment engine, which doesn't spy on users. It can be embedded into blogs, articles or any other place where readers add comments. Authentication handled by external providers. You should setup oauth2 for all (or some) of them to allow users to make comments. It is not mandatory to have all of them, but at least one should be correctly configured.

Comments App - A real-time, markdown-enabled comment engine powered by leveldb with oauth support

•    Javascript

A real-time comment engine with support for anonymous or authenticated posts.

disqus - A Ruby library for the Disqus commenting API and Javascript widgets.

•    Ruby

A Ruby library for the Disqus commenting API and Javascript widgets.

giscus - A comments system powered by GitHub Discussions

•    Typescript

A comments system powered by GitHub Discussions. Let visitors leave comments and reactions on your website via GitHub. It is heavily inspired by utterances. It does not require database, all data is stored in GitHub Discussions. It is Extensively configurable and supports Custom themes, Multiple languages.

Symbio - Commenting System

•    Perl

Got a blog? Then you'll definitely want this commenting system. It's got lots of cool features, including themes, multi-language support, smileys, text styling and statistics, and best of all, it's free software!

Squash - Bug Smashing Tool

•    Ruby

Squash is an exception reporting and bug analysis tool from Square. Squash lets you analyze information about a bug to determine its root cause. Squash includes a full-featured commenting system, ticket-management system. Squash analyzes the stack trace of every exception, and determines which line in the backtrace is the source of the bug. It then uses git to figure out who might have caused the bug,

lambda-comments - Blog commenting system built with AWS Lambda

•    Javascript

This project which implements a minimal blog commenting service. The Lambda functions are written in ES6, with async/await, transpiled using Babel, and bundled using Webpack.

VosaoCMS - simple CMS for Google App Engine

•    Java

Vosao (vo-za) is a content management system (CMS) that enables you to build web sites and online applications on the Google App Engine platform for Java.

talk - A better commenting experience from Vox Media

•    Javascript

Online comments are broken. Our open-source commenting platform, Talk, rethinks how moderation, comment display, and conversation function, creating the opportunity for safer, smarter discussions around your work. Read more about Talk here. Built with <3 by The Coral Project, a part of Vox Media.

SharePoint Comments Anywhere

This is a very simple project which provides a commenting web part and a list template with the instance to store user's comments. SharePoint OTB only provides commenting capability on the Blog sites where users add their posts and anyone can view the page and add comments....

nerdcommenter - Vim plugin for intensely orgasmic commenting

•    Vim

Comment functions so powerful—no comment necessary. Most of the following mappings are for normal/visual mode only. The |NERDComInsertComment| mapping is for insert mode only.

vim-commentary - commentary.vim: comment stuff out

•    Vim

Comment stuff out. Use gcc to comment out a line (takes a count), gc to comment out the target of a motion (for example, gcap to comment out a paragraph), gc in visual mode to comment out the selection, and gc in operator pending mode to target a comment. You can also use it as a command, either with a range like :7,17Commentary, or as part of a :global invocation like with :g/TODO/Commentary. That's it. I wrote this because 5 years after Vim added support for mapping an operator, I still couldn't find a commenting plugin that leveraged that feature (I overlooked tcomment.vim). Striving for minimalism, it weighs in at under 100 lines of code.