WP Multi Network

This plugin allows a post author to quickly and easily insert text and image links to Amazon product pages into posts.

Domain Check lets you search domain names, check SSL certificates and HTTPS, set email alerts for domain and SSL expiration, and get daily coupons.

The Easy Admin Color Schemes plugin allows users to easily customize the colors of the administration interface for WordPress.

A set of tools dedicated to post type, Post-type Switcher and Post Duplicate (works with any custom post-type).

Puts your WordPress site into maintenance mode by sending a 'Error 503: Access Denied/Forbidden' status to all unauthenticated clients.

With this plugin it is possible to automatically fill in the title attribute of a link in WordPress editor. This plugin requires PHP5.3+

Allow registered users to upload & select their own avatars.

Sort taxonomy terms, your way.

Assign images to categories, tags, and other taxonomy terms with the WordPress media library.

Organize Media Library attachments with categories and filter them in list and grid views.

Pretty colors for categories, tags, and other taxonomy terms

Group WordPress users with custom taxonomies and terms.