Carlos Longarela

<ul>
<li>Note: this plugin is no longer maintained to add new options because WordPress offers a similar option in Tools -> Site health 
About the tools available in this plugin, you have updated and new tools in a browser extension of this author (Best WordPress Tools) available for all browsers.</li>
</ul>
WordPress plugin that show us information about WordPress install, PHP, Database and Hosting Server and also minimum requisites and recommendations for PHP and Database versions.

CL WP Info

Fantástico plugin para conocer todo sobre tu instalación de WordPress y tu servidor. Imprescindible en muchas ocasiones.

No es un plugin para tener siempre activo, pero sí para tenerlo siempre instalado y revisar la información cada poco tiempo, antes de actualizaciones, para comprobar requisitos, estado de la memoria del servidor y mucho más.

Imprescindible

Show us information about WordPress install, PHP, Database and Hosting Server

jurredeklijn

This is a plugin to manage all your posts and pages from all websites from 1 website.
The only thing that u have to do is add the plugin code that u can find on the wordpress website on the management website (https://blog.tool.wux.nl/). 
On this website u can manage everything.

Wux Blog Editor

Plugin to add, edit all posts and pages from different websites on 1 website.

CL WP Info vs Wux Blog Editor