Christian Leuenberg

This plugin adds a handy widget to the dashboard displaying several server specifications like the PHP, Zend and MySQL version or the installed OS on your server.
Features:
<ul>
<li>Server information as dashboard widget</li>
<li>PHP, Zend and MySQL versions</li>
<li>Server OS</li>
<li>Type of web server</li>
<li>WordPress version</li>
</ul>

Dashboard Server Specs


This plugin show server information such as PHP version, OS, MySQL version (and more) on dashboard.



It isn't showing too much but necessary server info for the current website.



However the DB/MySQL section can be improve to show real info that is not just a version number provided by WordPress. For example 5.5.5-10.4.20-MariaDB.


Works very well

Adds a dashboard widget displaying server specs like current PHP version.

Stefano Lissa

Hyper Cache is a cache plugin specifically written to get the maximum speed for your WordPress blog.
It can be used in low resources hosting as well on high end servers.
Hyper Cache is purely PHP and works on every blog: no complex configurations are needed and when you deactivate it no stale settings are left around.
NOTE
Mobile detection server side and serving different content to mobile and desktop device is now obsolete. 
Every modern WP theme deals with mobile/desktop contexts using the media queries, progressive enhancement and so on. 
So I don’t see the need to keep the mobile/desktop cache separation and all the overhead in the plugin. The feature will be removed as version 3.5.
Short list of features:
<ul>
<li>Mobile aware: double cache for desktop and mobile site versions</li>
<li>HTTPS ready</li>
<li>Mobile theme switch option: change the theme on mobile device detection</li>
<li>Able to serve expired pages to bots to increase the perceived blog speed by bots</li>
<li>Manages compression even on the fly for non cached pages</li>
<li>Lots of configurable bypasses: matching cookies, matching urls, user agents, …</li>
<li>Comments aware: is able to serve cached pages even to visitors who commented the blog (perfect for blog with great readers paritipation)</li>
<li>Cache folder can be moved outside your blog space to exclude it from backups</li>
<li>Controls over cache cleaning on blog events (post edited, comments, …)</li>
<li>Autoclean to controls the cache used disk space</li>
<li>CDN support</li>
<li>Other special options</li>
<li>Response header signature to check the working status</li>
<li>bbPress specific integration</li>
</ul>
More can be read on the <a href="https://www.satollo.net/plugins/hyper-cache" rel="nofollow ugc">Hyper Cache official page</a>.
You can further optimize the blog installing <a href="https://wordpress.org/plugins/autoptimize/" rel="ugc">Autoptimize</a> which cleans up the HTML, minifies and concatenates CSS and JavaScript.
Other plugins by Stefano Lissa:
<ul>
<li><a href="https://www.thenewsletterplugin.com" rel="nofollow ugc">Newsletter</a></li>
<li><a href="https://www.satollo.net/plugins/header-footer" rel="nofollow ugc">Header and Footer</a></li>
<li><a href="https://www.satollo.net/plugins/include-me" rel="nofollow ugc">Include Me</a></li>
<li><a href="http://www.satollo.net/plugins/thumbnails" rel="nofollow ugc">Thumbnails</a></li>
</ul>

Hyper Cache

Super fast, not overly complicated but with enough settings to customize for any set up. Most importantly: works like a charm on VPS!

THE caching plugin

Really well coded plugin, improved pagespeed for google from 86 to 93 compared to lightspeed cache. Simple and reliable.

Simply faster

Hyper Cache is a performant and easy to configure cache system for WordPress.

Dashboard Server Specs vs Hyper Cache