Akismet checks your comments against the Akismet Web service to see if they look like spam or not.
Increase your traffic, view your stats, speed up your site, and protect yourself from hackers with Jetpack.
Allows administrators to globally disable comments on their site. Comments can be disabled according to post type. Multisite friendly.
Simple but effective plugin allows you to extensively clean up your WordPress database and optimize it without doing manual queries.
This plugin will check your posts, comments and other content for broken links and missing images, and notify you if any are found.
Adds CAPTCHA anti-spam methods to WordPress on the forms for comments, registration, lost password, login, or all.
The Disqus comment system replaces your WordPress comment system with your comments hosted and powered by Disqus.
ManageWP is the ultimate WordPress productivity tool, allowing you to efficiently manage your websites.
Add Facebook social plugins and the ability to publish new posts to a Facebook Timeline or Facebook Page. Official Facebook plugin.
No spam in comments. No captcha.
All-in-one WordPress spam protection, with NO CAPTCHAs, challenge questions or other inconvenience to site visitors.
The shared code library for Similar posts, Recent Posts, Random Posts, Popular Posts and Recent Comments.
SEO Smart Links provides automatic SEO benefits for your site in addition to custom keyword lists, nofollow and much more.
WP-Paginate is a simple and flexible pagination plugin which provides users with better navigation on your WordPress site.
Subscribe to Comments allows commenters on an entry to subscribe to e-mail notifications for subsequent comments.
Todd Lahman's comment spam blocking plugin that blocks automated spam with zero false positives.
WP Clean Up can help us to clean up the wordpress database by removing "revision" "draft" "auto draft" and so on.
Defeat automated spambots (even the new 'learning' bots with dynamically named hidden fields) by adding a client side generated checkbox.
Spam protection, all-in-one, premium anti-spam plug-in. No comments spam, registrations & users spam, no contact form spam, protects any forms.
Powerful anti-spam plugin that eliminates blog comment spam. Finally, you can enjoy a spam-free WordPress blog! Includes contact form.
Custom feeds for Facebook Pages, Groups, Events, Album Photos, Videos & Covers, Twitter, Vine, Instagram, Pinterest & YouTube on pages, posts
Allow your visitors to comment and login with social networks like Twitter, Facebook, Paypal, LinkedIn, Instagram, OpenID, VKontakte, Google, Pinteres
The easiest way to create powerful online communities and beautiful user profiles with WordPress
The ultimate widget for displaying posts, custom post types or sticky posts with an array of options.
Aggressive anti-spam plugin that eliminates comment spam, trackback spam, contact form spam and registration spam. Protects against malicious attacks.
Delete all comments from your database easily.
An admin interface to control the default comment and trackback settings on new posts, pages and custom post types.
Sets a cookie on a random URL that is then checked when a comment is posted. If the cookie is missing the comment is marked as spam. This plugin will
A quick way to delete all pending comments. Useful for victims of spammer attacks.
WP-Sweep allows you to clean up unused, orphaned and duplicated data in your WordPress. It also optimizes your database tables.