WordPress.org

Akismet checks your comments against the Akismet Web service to see if they look like spam or not.

By: Matt Mullenweg, Ryan Boren, Andy Skelton, Michael Adams (mdawaffe), ar others.

Increase your traffic, view your stats, speed up your site, and protect yourself from hackers with Jetpack.

By: Automattic, Adam Heckler, Andrew Duthie, Alex Kirk, allendav, alternatekev, ar others.

Allows administrators to globally disable comments on their site. Comments can be disabled according to post type. Multisite friendly. Provides tool t

By: Samir Shah.

WP-Optimize is WordPress's most-installed optimization plugin. With it, you can clean up your database easily and safely, without manual queries.

By: David Anderson, ruhanirabin, DNutbourne, aporter, ar snightingale.

This plugin will check your posts, comments and other content for broken links and missing images, and notify you if any are found.

By: Vladimir Prelovac.

ManageWP is the ultimate WordPress productivity tool, allowing you to efficiently manage your websites.

By: managewp ar Vladimir Prelovac.

Adds CAPTCHA anti-spam methods to WordPress on the forms for comments, registration, lost password, login, or all.

By: Mike Challis.

The Disqus comment system replaces your WordPress comment system with your comments hosted and powered by Disqus.

By: disqus, Alex King, crowdfavorite, zeeg, tail, Tyler Hayes, ar ryanv12.

Add Facebook social plugins and the ability to publish new posts to a Facebook Timeline or Facebook Page. Official Facebook plugin.

By: Facebook, Automattic, Niall Kennedy, Matt Kelly (Facebook), Rishi Gharpuray, ar others.

No spam in comments. No captcha.

By: webvitalii.

All-in-one WordPress spam protection, with NO CAPTCHAs, challenge questions or other inconvenience to site visitors.

By: Red Sand Media Group, Blackhawk Cybersecurity, ar RSMG Tech Support.

The shared code library for Similar posts, Recent Posts, Random Posts, Popular Posts and Recent Comments.

By: RobMarsh.

SEO Smart Links provides automatic SEO benefits for your site in addition to custom keyword lists, nofollow and much more.

By: Vladimir Prelovac.

What this plugin does is to reveal most removed IDs on admin pages, as it was in versions prior to 2.5.

By: wpseek.

WP-Paginate is a simple and flexible pagination plugin which provides users with better navigation on your WordPress site.

By: Max Foundry, Eric Martin, ar AlanP57.

Subscribe to Comments allows commenters on an entry to subscribe to e-mail notifications for subsequent comments.

By: Mark Jaquith ar joen.

Todd Lahman's comment spam blocking plugin that blocks automated spam with zero false positives.

By: Todd Lahman.

WP Clean Up can help us to clean up the wordpress database by removing "revision" "draft" "auto draft" and so on.

By: boliquan.

Defeat automated spambots (even the new 'learning' bots with dynamically named hidden fields) by adding a client side generated checkbox.

By: Andy Bailey.

Spam protection, anti-spam, all-in-one, premium plug-in. No comments spam & users spam, no contact form & WooCommerce spam. Forget spam.

By: Alex Z, Denis Shagy, SergeM, ar Artyom Davydov.

Custom feeds for Facebook Pages, Groups, Events, Album Photos, Videos & Covers, Twitter, Vine, Instagram, Pinterest & YouTube on pages, posts

By: slickremix.

The easiest way to create powerful online communities and beautiful user profiles with WordPress

By: Ultimate Member ar Champ Camba.

Powerful anti-spam plugin that eliminates blog comment spam. Finally, you can enjoy a spam-free WordPress blog! Includes contact form.

By: Pole Position Marketing ar Aziz.

Allow your visitors to comment and login with social networks like Twitter, Facebook, Paypal, LinkedIn, Instagram, OpenID, VKontakte, Google, Pinteres

By: Claude ar OneAll.

The ultimate widget for displaying posts, custom post types or sticky posts with an array of options.

By: bostondv.

An admin interface to control the default comment and trackback settings on new posts, pages and custom post types.

By: Seth Alling.

Aggressive anti-spam plugin that eliminates comment spam, trackback spam, contact form spam and registration spam. Protects against malicious attacks.

By: Keith Graham.

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

By: Donncha O Caoimh ar Automattic.

WP-Sweep allows you to clean up unused, orphaned and duplicated data in your WordPress. It also optimizes your database tables.

By: Lester Chan.

A quick way to delete all pending comments. Useful for victims of spammer attacks.

By: nkuttler.