Michal Slepko

Rootscope Remote Site Manager allows you to manage multiple WordPress sites from a single dashboard. Monitor your WordPress versions, plugins, themes, and log in with one click.
Features:
<ul>
<li>Centralized dashboard for all your WordPress sites</li>
<li>Track WordPress core version</li>
<li>Monitor installed plugins and themes</li>
<li>Get notified about available updates</li>
<li>One-click login to wp-admin</li>
<li>Automatic daily sync</li>
</ul>
<h3>Third-Party Service</h3>
This plugin connects to the <a href="https://wp-admin.online" rel="nofollow ugc">Rootscope Remote Site Manager</a> service to provide centralized WordPress site management. The following data is sent to the Rootscope Remote Site Manager API (<code>https://wp-admin.online/api/v1</code>): 
* WordPress version and PHP version 
* List of installed plugins and themes (names, versions, active status) 
* Administrator usernames and display names (for one-click login)
Data is transmitted over HTTPS and authenticated using HMAC signatures. No data is sent until you configure your API credentials.
<ul>
<li><a href="https://wp-admin.online/terms" rel="nofollow ugc">Terms of Service</a></li>
<li><a href="https://wp-admin.online/privacy" rel="nofollow ugc">Privacy Policy</a></li>
</ul>

Rootscope Remote Site Manager

Connect your WordPress site to wp-admin.online remote Site Manager for centralized management.

GTmetrix

GTmetrix has created GTmetrix for WordPress – a WordPress plugin that actively keeps track of your WP install and sends you alerts if your site falls below certain criteria.
Run analyses, schedule reports on a daily, weekly or monthly basis, and receive alerts about the status of your site all from within your WordPress Admin!

GTmetrix for WordPress

Plugin isn't showing the toolbar link in the latest version of WP now :(

Fantastic plugin but...

GTmetrix can help you develop a faster, more efficient, and all-around improved website experience for your users. Your users will love you for it.

Rootscope Remote Site Manager vs GTmetrix for WordPress