Jon Tejnung

This plugin will give you three alternatives for managing your WordPress updates:
<ul>
<li>Update automatically – This updates WordPress/themes/plugins automatically and sends an email to the site admin when an update has been performed.</li>
<li>Update automatically (no email) – Same as the first alternative, but without the email.</li>
<li>Inform about updates once a week – This will send an email to the admin once a week if there are anything that can be updated.</li>
</ul>
Notice that only plugins/themes that resides in the WordPress 
repository will be updated/informed about.
The plugin has not been tested and is not primarily made for multi site-installations.

Simple Automatic Updates

Activate automatic updates or weekly notifications for the site.

Emil Gustafsson

Upperdog

When WordPress is updated, it re-installs wp-config-sample.php, readme files, and license files even though you may have deleted them before. This plugin automatically removes these files when WordPress is manually or automatically updated. It also removes these files when activating the plugin for the first time. Removing these files is not mandatory, but you may want to if you don’t want them to expose your WordPress version or if you just like to keep things neat and clean.
Files that are removed:
<ul>
<li>License files, both default and localized</li>
<li>Readme files, both default and localized</li>
<li>wp-config-sample.php</li>
<li>wp-admin/install.php</li>
</ul>
You may not want to install this plugin if you’re using a plugin or service to scans your site to verify checksums on the core files. When the removed files are missing it might result in warnings.
<h3>Manual installation</h3>
<ol>
<li>Upload the <code>wp-core-update-cleaner</code> directory to the <code>/wp-content/plugins/</code> directory.</li>
<li>Activate the plugin through the ‘Plugins’ menu in WordPress.</li>
</ol>

WP Core Update Cleaner

This plugin automatically removes some files in the root folder, like wp-config-sample.php, readme and license files, when WordPress is manually or au …

Simple Automatic Updates vs WP Core Update Cleaner