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), and others.

The most popular WordPress gallery plugin and one of the most popular plugins of all time with over 16 million downloads.

By: photocrati and imagely.

Improve your WordPress SEO: Write better content and have a fully optimized WordPress site using the Yoast SEO plugin.

By: yoast, Joost de Valk, tacoverdo, Omar Reiss, Anton Timmermans, and Jip Moors.

The one plugin you need for stats, related posts, search engine optimization, social sharing, protection, backups, speed, and email list management.

By: Automattic, adamkheckler, Andrew Duthie, Alex Kirk, allendav, alternatekev, and others.

The best Google Analytics plugin for WordPress. See how visitors find and use your website, so you can keep them coming back.

By: chriscct7 and Syed Balkhi.

Search Engine (SEO) & Performance Optimization (WPO) via caching. Integrated caching: CDN, Minify, Page, Object, Fragment, Database support.

By: Frederick Townes.

Customise WordPress with powerful, professional and intuitive fields

By: elliotcondon.

The original SEO plugin for WordPress, downloaded over 30,000,000 times since 2007.

By: Michael Torbert, Steve Mortiboy, Dougal Campbell, Peter Baylies, and others.

Adds a more advanced paging navigation interface.

By: Lester Chan and scribu.

Build responsive page layouts using the widgets you know and love using this simple drag and drop page builder.

By: Greg Priday and braam-genis.

Modern two-factor that people love to use: strong authentication without passwords or tokens; single sign on/off; magical login experience.

By: Dave Ross, Jesse Pollak, Andrew Russell, and inthylight.

A very fast caching engine for WordPress that produces static html files.

By: Donncha O Caoimh, Automattic, and Brandon Kraft.

This is not just a plugin, it symbolizes the hope and enthusiasm of an entire generation summed up in two words sung most famously by Louis Armstrong.

By: Matt Mullenweg.

Allows you to regenerate your thumbnails after changing the thumbnail sizes.

By: Alex Mills (Viper007Bond).

Clone posts and pages.

By: Lopo.

WooCommerce is a powerful, extendable eCommerce plugin that helps you sell anything. Beautifully.

By: Automattic, Mike Jolley, James Koster, Claudio Sanches, Justin Shreve, and others.

Secure your website with the most comprehensive WordPress security plugin. Firewall, malware scan, blocking, live traffic, login security & more.

By: Wordfence.

Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.

By: Takayuki Miyoshi.

This plugin will generate a special XML sitemap which will help search engines to better index your blog.

By: Arne Brachhold.

Extends and enhances TinyMCE, the WordPress Visual Editor.

By: Andrew Ozz.

Backup and restoration made easy. Complete backups; manual or scheduled (backup to S3, Dropbox, Google Drive, Rackspace, FTP, SFTP, email + others).

By: Backup with UpdraftPlus, David Anderson, DNutbourne, aporter, and snightingale.

Just another contact form plugin. Simple but flexible.

By: Takayuki Miyoshi.

Import posts, pages, comments, custom fields, categories, tags and more from a WordPress export file.

By: WordPress.org.

Displays Google Analytics stats in your WordPress Dashboard. Inserts the latest Google Analytics tracking code in your pages.

By: Alin Marcu.

Duplicate, clone, backup, move and transfer an entire site from one location to another.

By: corylamleorg and Bob Riley.

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.

Multibyte functionality enhancement for the WordPress Japanese package.

By: Seisuke Kuraishi (tenpura).

The visual editor widget for WordPress.

By: Black Studio, Marco Chiesi, and Francesco Canovi.

A collection of all widgets, neatly bundled into a single plugin. It's also a framework to code your own widgets on top of.

By: Greg Priday and braam-genis.

Take the guesswork out of WordPress security. iThemes Security offers 30+ ways to lock down WordPress in an easy-to-use WordPress security plugin.

By: iThemes, Chris Jean, gerroald, and Matt Danner.