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 …

omnisite

A standard WP installation contains many links in the head of your HTML (which slow down your site) and has standard widgets you might never use. You can now install this plugin and check the items you want to have removed. The saved options are cached for better performance.
Header items you can remove: 
* Remove dashicons CSS from frontend 
* Remove RSD / EditURI Link 
* Remove WLW Manifest Link 
* Remove RSS Feed Links 
* Remove Next & Prev Post Links 
* Remove Shortlink URL (also from http headers) 
* Remove WP Generator Meta 
* Remove Version Numbers from Style and Script Links 
* Disable WP Emoji / emoticons 
* Disable JSON API 
* Disable Canonical URL 
* Remove WooCommerce Generator Meta 
* Remove jQuery Migrate script 
* Disable XML-RPC methods that require authentication 
* Remove all scripts and styles added by Gutenberg (in case you still use the classic editor)
You can disable the following widgets: 
* Archives 
* Calendar 
* Categories 
* Links 
* Meta 
* Nav Menu 
* Pages 
* Recent Comments 
* Recent Posts 
* RSS 
* Search 
* Tag Cloud 
* Text

Remove WordPress Overhead

Made by me, because I was always pasting in the same code in my theme functions file. So I made a plugin for it :-)

Great for cleaning up your header

Remove overhead from the  HTML, speed up your website and disable widgets you don't use

Cleaner WordPress Editor vs Remove WordPress Overhead