Well here is the list:
Customize columns on the administration screens for post(types), pages, media, comments, links and users with an easy to use drag-and-drop interface.
Fully customise WordPress edit screens with powerful fields.
Easily configure this widget to display any amount of posts (from 1 to 99) from a category into any widgetized area of your blog.
Easily add a Favicon to your site and the WordPress admin pages.
Cloning posts and pages in WordPress.
Allows multiple authors to be assigned to a post. This plugin is an extended version of the Co-Authors plugin developed by Weston Ruter.
Just another contact form plugin. Simple but flexible.
Supports multiple languages, themes, highlighting from a URL, local file or post text.
Admin panel for creating custom post types and custom taxonomies in WordPress
Disables WordPress core update checks and notifications.
Register widget to display authors by role in a sidebar.
Clone posts and pages.
Dynamic Widgets gives you full control on which pages your widgets will appear.
Allows you to log into WordPress (directly or via XML-RPC) using your email address instead of a(nother) username.
Very small and easy to use widget and shortcode to display social icons on your site. Facebook, Twitter, Flickr, Google Plus, Youtube, LinkedIn, DeviantArt, Meetup, MySpace, Soundcloud, Bandcamp, Pinterest, Vimeo and RSS feed
Event registration and booking management for WordPress. Recurring events, locations, google maps, rss, ical, booking registration and more!
This plugin allows users to add font awesome icon support to their website using HTML or built-in shortcode handler. It’s fully functional with Visual Composer Page Builder Plugin.
This plugin makes it simple to add Google Analytics to your WordPress site, adding lots of features, e.g. error page, search result and automatic outgoing links and download tracking.
Lightbox is the perfect tool for viewing photos.
Protect your WordPress site by hiding vital areas of your site, protecting access to important files, preventing brute-force login attempts, detecting attack attempts and more.
Drop a PNG file named login-logo.png into your wp-content directory.
Ajax driven login widget. Customisable from within your template folder, and advanced settings from the admin area.
Take your website for maintenance away from public view.
Automatically toggle the parent categories when a sub category is selected.
Forces the WordPress editor to paste everything as plain text.
Allows you to regenerate all thumbnails after changing the thumbnail sizes.
Enhances the user registration process with complete customization and additional administration options.
Change wp-login.php to whatever you want.
Reveals hidden IDs in Admin interface that have been removed
Adds a ‘Flush Rewrite Rules’ button to WP-Admin > Settings > Permalinks.
Uses the jQuery plugin ScrollTo by Ariel Flesler to smoothly scroll the user’s browser to the top of the page when the user clicks the unobtrusive go-to-top image.
Adds a text-like widget that allows you to write shortcode in it. (Just whats missing in the default text widget)
This plugin generates as many sidebars as you need. Then allows you to place them on any page you wish.
Enables support for sticky custom post types. Set options in Settings → Reading.
The ultimate widget for displaying posts, custom post types or sticky posts with an array of options.
Beef up your visual tinymce editor with a plethora of advanced options.
Change/add/delete WordPress user roles and capabilities.
This plugin allows you to quickly swap between user accounts in WordPress at the click of a button.
WordPress Database Administrator plugin for WordPress Database Access. Simple but Powerfull.
Easily switch languages and download translations for WordPress
The first true all-in-one SEO solution for WordPress, including on-page content analysis, XML sitemaps and much more.
Efectively blocks admin portion of site for selected user roles.
Easily add your own link or logo to the WordPress Admin Bar. Then highlight important links for your users through a simple drop-down menu!
A plugin that provides a WordPress Shopping Cart.
Style the emails that WP E-Commerce sends to your customers.
Interface to customize the permalinks (author, category, archives and pagination) and htaccess file generated by WordPress.
Very fast caching plugin for WordPress.