Sweep your WordPress install for superficial data stored in your database and make your site run faster and customizable. Tweak the optimization settings, and exclude any tables from being touched by the plugin at all if it stores sensitive data.
Adds new functionality in your admin panel so that you can switch between users and edit posts or profiles, then easily switch back at any time. Also allows you to Switch Off admin so that you can view site as a logged out user.
Add new menu items for each post status, with the number of posts in each, to your admin panel. Works with custom post types and custom post statuses, and fully customizable.
Keep track of which comments have been replied to right from your admin panel. A new row will appear in your comments admin section that indicates whether or not it has been replied to, or it is from the post author.
Add redirects to your site, either on a post by post basis using a metabox provided at the bottom of your post editor, or using the Quick 301 Redirects feature for any page or directory. Global override options are also available and customizable.
Edit your post without every having to go to the back-end. While browsing your site, this plugin will enable a small "Edit" button next to your post that will open a WYSIWYG editor inline, in the front-end of your post.
Sync your WordPress site with the Twitter API and customize which posts should be automatically tweeted to your account. Control the content of your tweets, and change settings on a post to post basis with a built-in meta box in your post editor.
Add related posts to the bottom of your pages, which are based on post title and post content rather then just categories and tags. You can chose which post types to add to, customize the output, or implement the plugin manually.
Generate new thumbnails when new image sizes are added to your WordPress theme. You can regenerate all of your thumbnails at once, or chose just a few, or even just one image using the Media Library.
Clone your WordPress posts from a few different locations in your admin panel, and customize the outputted title of the post. Options to edit a post right away, or save it as a draft and come back to it later.
Swap out images and assets you have already uploaded without having to delete images and replace them manually. Gives you access to a new option in your Media Library entitled "Replace Media."
The swiss army knife of plugins, the Jetpack plugin comes with a few dozen features to enhance your WordPress site, from carousels and comments to a full JSON REST API.