Ad Inserter
Insert any ad or code into WordPress. Perfect for all kinds of ads. Simply enter any ad or HTML/Javascript/PHP code and select where and how you want to display it.
Akismet
Used by millions, Akismet is quite possibly the best way in the world to protect your blog from spam. It keeps your site protected even while you sleep. To get started: 1) Click the “Activate” link to the left of this description, 2) Sign up for an Akismet plan to get an API key, and 3) Go to your Akismet configuration page, and save your API key.
CataBlog
CataBlog is a comprehensive and effortless tool that helps you create, organize and share catalogs, stores, galleries and portfolios on your blog.
Category Tag Pages
Adds categories and tags functionality for your pages.
Custom Facebook Feed
Add completely customizable Facebook feeds to your WordPress site
Jetpack by WordPress.com
Bring the power of the WordPress.com cloud to your self-hosted WordPress. Jetpack enables you to connect your blog to a WordPress.com account to use the powerful features normally only available to WordPress.com users.
List category posts
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, the order in which you want the posts to display, the number of posts to display and many more parameters. You can use [ catlist ] as many times as needed with different arguments. Usage: [ catlist argument1=value1 argument2=value2 ].
Postie
Create posts via email. Significantly upgrades the Post by Email features of WordPress.
Redirection
Manage all your 301 redirects and monitor 404 errors
Yoast SEO
The first true all-in-one SEO solution for WordPress, including on-page content analysis, XML sitemaps and much more.