Easily block obvious spam before it is inserted into your database.
Add a Like button in all your posts and replies. Let the users appreciate others contribution.
Customize and optimize comments in WordPress
Adds a 5 star rating field to the end of a comment form in WordPress.
WP Side Comments create a new way to display comments like in medium.com network. It's based on SideComment.js
Bulk delete posts, pages or users in bulk based on different conditions and filters.
Add a new user role, Comment Moderator, that allows any selected user to manage comments.
An easy to use wordpress Captcha plugin to prevent spam on your site. You can use Image Captcha to protect comments and the admin panel.
The Google+ and Disques WordPress plugin makes it easier for you to administer and customise Google+ and Disques comment from your WordPress site.
Plugin to reject spam. Port from same author from http://www.phpbbantispam.com
Actually visits the URL from commenter to spider for spamwords.
Sends out an email to the blog admin when a commenter accesses the blog with a certain username/ email address/ website url.
The WordPress SEO Comments Plugin turns comments into search engine optimized portals to your blog, new Google SEO entry points into WordPress sites.
Creates a widget which lists all comments across all sites of a multi site wordpress installation
Comment Signature provides easy way to add user's signature who already registered on that site.
Implementation of Mozilla Persona (BrowserID) for WordPress
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