Dawi

This plugin has a configuration panel with options to add functionality to WordPress. There are general options, visual, even security.
<h4>Options</h4>
<ul>
<li>Easy Maintenance Mode</li>
<li>Disable automatic formatting</li>
<li>Remove RSD link</li>
<li>Remove wlwmanifest</li>
<li>Automatically generate the meta-description in the news</li>
<li>Shortcodes in Widgets</li>
<li>Hide login errors</li>
<li>Prevent direct file access to functions.php</li>
<li>Restrict wp-admin access to subscribers</li>
<li>Remove the WordPress version</li>
<li>Remove the WordPress version of the RSS</li>
<li>Disable auto-saving items</li>
<li>Add post thumbnails</li>
<li>Set as default to the HTML editor</li>
<li>Disable the default WordPress widgets</li>
<li>Remove margin-top automatically generated</li>
<li>Prevent WordPress to compress your jpg images</li>
<li>Remove Gallery Settings</li>
<li>Unlock buttons useful in the visual editor</li>
</ul>

Quick General Options

Configuration panel with multiple options to enable/disable features in WordPress.

WordPress.org

Dion Hulse

Andrew Nacin

Most sites are able to apply updates in the background. Background Update Tester checks your site for compatibility and explains any problems.
After activating this plugin, visit the Dashboard → Update Tester screen. (If you are using multisite, visit Updates → Update Tester in the network admin.)
This is an initial release.

Background Update Tester

Most sites are able to apply updates in the background. Background Update Tester checks your site for compatibility and explains any problems.

Quick General Options vs Background Update Tester