Customize and optimize comments in WordPress

Allows users to opt into receiving a notification email whenever a comment is made to the site.

Muut represents a complete re-imagination of what internet discussion forums and commenting should be. It’s a modern, fast, highly scalable discussion …

The Google+ Comments WordPress plugin makes it easier for you to setup, administer and customise Google+ comments from your WordPress site.

Use the Sided plugin to create and insert discussion polls into your content.

AJAX Report Comments is a simple yet powerful add-on for any Wordpress blog, particularly larger blogs with a higher volume of user comments.

Allow an admin user (when logged in) to always be able to comment on a post, even if comments are closed for the post.

Easily subscribe to a P2 comment thread without commenting using a "Follow" action link like WordPress.com has

This plugin lets you implement a cookie based front-end authorization system that can be used (for example) to allow users who are logged in via an sy …

The uTitle Plugin allows timeline commenting of YouTube videos using Twitter by integrating with the experimental uTitle tool