fr33think3r

This plugin makes wordpress posting/editing a less strainful experience. It weeds out all the junk in the post editor window so that its easier to concentrate on writing. This is sort of an alternative to WordPress Full Screen Editor.
You can read about about it in this blog post => http://www.humbug.in/2011/wordpress-plugin-cleaner-wordpress-editor-trying-to-make-wordpress-editing-a-pleasure/
The plugin will change the following things:
<ul>
<li>Editor Font will be changed to Georgia instead of Consolas</li>
<li>Editor Font size will be increased by 110% in the Visual Editor and 120% in the HTML Editor. The Line Height will also be increased accordingly.</li>
<li>Editor Background Color will be changed to #FCFCFC and the Font Color to #333333. This is to reduce strain on the eyes. The original black and white combination has a high contrast.</li>
<li>The Editor will be set into the Single Column Mode.</li>
<li>The Left Side Navigation bar will be collapsed.</li>
<li>All extra non functional elements will be hidden.</li>
</ul>
Since the plugin forces the Edit Screen into a single column scheme, once you have installed the plugin, all the widgets which you normally see on the right sidebar, like the publish button widget, will be pushed below the Visual/HTML Editor box. You will have to scroll down to see those widgets. Those widgets can be dragged and dropped to reorder them. However if you do re-order them, when you deactivate this plugin, they will retain that order and won’t revert to the original scheme. So please do make sure that you like the new Edit Screen, before re-ordering your widgets.
Uninstalling the plugin will automatically take you back to your previous settings.
<h3>Upgrade</h3>
Upgrade using the Plugins menu

Cleaner WordPress Editor

This plugin makes wordpress posting/editing a less strainful experience. It weeds out all the junk in the post editor window so that its easier to con …

thaikolja

Thumbnails Cleaner helps you keep your WordPress installation tidy by removing and regenerating thumbnails.
You can control all functions through the plugins’ main page found under “Tools”. You can:
<ul>
<li>Analyze your uploads directory, giving you an overview how many original files and thumbnails there are.</li>
<li>Clean thumbnails which means deleting them while keeping the original files.</li>
<li>Restore thumbnails to start out with a clean uploads directory. This function requires the plugin <a href="https://wordpress.org/plugins/regenerate-thumbnails/" rel="ugc">Regenerate Thumbnails</a>.</li>
<li>Create backups of your uploads directory to keep your files safe in the unlikely event that there is a problem.</li>
<li>Restore backups in case you have lost a file that was not supposed to be deleted.</li>
</ul>
Please see the <a href="https://www.koljanolte.com/wordpress/plugins/thumbnail-cleaner/documentation/" rel="nofollow ugc">official website</a> for a full 
documentation.

Thumbnail Cleaner

Cleans up your WordPress installation by removing and regenerating thumbnails.

Cleaner WordPress Editor vs Thumbnail Cleaner