Livefyre!

Disqus is the web’s most popular discussion system. It's a global comment system that improves discussion on websites and connects conversations across the web.

A commenting server similar to Disqus and IntenseDebate

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

Epoch is a new plugin from the creators of Postmatic. The goal: To provide a realtime commenting/chat experience using fully native comments while being compatible with page caching, cdns, mobile, other comment plugins, and seo best practices. A tall order? For sure. Try it out.

IntenseDebate is the premier commenting system available on the Internet for blogs and websites. IntenseDebate comments enhances and encourages conversation on your blog or website. With IntenseDebate you can give your blog readers the opportunity to better engage your blogs content and each other. ID offers numerous features that makes improves the commenting experience, like our Reply By Email functionality which enables you to reply to and moderate comments via email!

Customizable Comments For Your Site. It comes with beautiful themes.You can 100% customize its looks though and no iframes needed. No coding or databases needed either, thus great for static sites.

Comments Box is a social plugin that enables user commenting on your site. Features include moderation tools and distribution.

Almost every business owns a website these days. However, few of them are able to engage their visitors. We provide a solution. A comment widget with a strong focus on customizability, privacy and a modern look.

GraphComment is the next generation comments system. No more disorganized discussions piled on several pages. With GraphComment, you can easily follow the relevant discussions. The BubbleRank sort the answers in order of relevance.

Comment with contextInteracting without context robs your audience of meaningful interactions. Krowdify Notes allows your users to highlight their favorite part of your content and comment on it inline as opposed to leaving a lonely comment at the bottom of the page.

Powering the Realtime Social Layer for Entertainment, Local Media and High Traffic Blogs. Realtidbits was acquired by Livefyre.com.

SolidOpinion is a fun, new and dynamic commenting platform. Members earn points for being engaged in the discussion - for example, for posting and viewing comments. They can use points to buy fun power-ups and dominate the discussion, engage in micro-transactions or sell points to other members. Every transaction monetizes your content.

HTML Comment Box is an easy wasy for your website to receive, and optionally approve/delete comments from your visitors.Just paste the html comment box code near the bottom of your web page's HTML source, and voila!