WordPress.org

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, and 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.

Display a list of related posts on your site based on a powerful unique algorithm.

By: jeffparker.

Easily redirect pages/posts or custom post types to another page/post or external URL by specifying the redirect URL and type (301, 302, 307, meta).

By: anadnet.

A highly customizable, easy-to-use popular posts widget!

By: Hector Cabrera.

Simply hide widgets on specified pages. Adds checkboxes to each widget to either show or hide it on every site page.

By: Steph Wells.

Shrink, beautify, track, manage and share any URL on or off of your WordPress website. Create links that look how you want using your own domain name!

By: Blair Williams.

Automatically publishes blogposts to profiles/pages/groups on Facebook, Twitter, Instagram, Google+, Pinterest, LinkedIn, Blogger, Tumblr ... 22 more

By: NextScripts.

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, and others.

The WP Google Fonts plugin allows you to easily add fonts from the Google Font Directory to your WordPress theme.

By: Adrian3.

Take complete control over the WordPress content editor.

By: Josh.

Automatically generate the Post Thumbnail (Featured Thumbnail) from the first image in post or any custom post type only if Post Thumbnail is not set

By: tariquesani.

Add some tools for taxonomies : Terms suggestion, Mass Edit Terms, Auto link Terms, Ajax Autocompletion, Click Terms, Auto terms, Advanced manage term

By: Amaury Balmer, rahe, BE API, and nicolaskulka.

Quick Adsense offers a quicker & flexible way to insert Google Adsense or any Ads code into a blog post.

By: toddynho and Philip Ze.

WordPress Related Posts - the plugin for related posts with thumbnails. Caching included.

By: Sovrn and Zemanta.

Save your wordpress blog from getting tagged as ping spammer. This plugin is a fork of the cbnet Ping Optimizer plugin.

By: Pankaj Jha.

WP Editor is a plugin for WordPress that replaces the default plugin and theme editors as well as the page/post editor.

By: benjaminprojas.

Adds shortcodes to easily create columns in your posts or pages.

By: Codepress, Tobias Schutter, David Mosterd, and dungengronovius.

Description: Beef up the WordPress TinyMCE content editor with a plethora of advanced options.

By: Josh and Marventus.

List Category Posts allows you to list posts by category in a post/page using the [catlist] shortcode. This shortcode accepts a category name or id, t

By: Fernando Briano.

Visit Counter, shows reads and visitors per page, visitors today, yesterday, last week, last months and other statistics.

By: Tom Braider.

Creates functionality to duplicate any and all post types, including taxonomies & custom fields.

By: metaphorcreations.

Platinum SEO Plugin offers Complete onsite SEO solution for your WordPress blog.Platinum SEO Plugin offers all the functionalities of All In One SEO p

By: Techblissonline Dot Com (Rajesh).

Easy Columns provides the shortcodes to create a grid system or magazine style columns for laying out your pages (or even posts!) just the way you nee

By: Pat Friedl.

Scans your WordPress installation for security vulnerabilities.

By: Acunetix.

Adds a tree view of all pages & custom posts. Get a great overview + options to drag & drop to reorder & option to add multiple pages.

By: and MarsApril.

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.

Adds a widget that shows the most recent posts from a single category.

By: Mark-k, kometschuh, and Mrinal Kanti Roy.

Display a listing of posts using the [display-posts] shortcode

By: Bill Erickson.