chriserk

This Plugin adds a Server Load Averages and Server Uptime widget into your 
Admin Dashboard and admin bar that automatically refreshes.
This Plugin adds an options page in your WordPress Admin Dashboard. After activating 
the Plugin, go to your Admin Dashboard Home and see the new widget and the load average in the admin bar. 
You can configure the admin bar load average options from the settings page under: 
Settings > [TNM] Server Status
Plugin developed by <a href="http://www.chriserk.com/" rel="nofollow ugc">Christopher Erk</a>.

[TNM] Server Status and Load Average

The WordPress Server Load Plugin adds a Server Load Averages and Server Uptime widget into your Admin Dashboard and a load average widget to the admin …

Sully

A simple unofficial plugin that shows the following stats from your NodeQuery account:
<ul>
<li>Server availability</li>
<li>Server load and load average</li>
<li>Disk Usage</li>
<li>RAM Usage</li>
</ul>
To generate an API key, go to your NodeQuery Account Settings -> API Settings: https://nodequery.com/settings/api

Dashboard Widget NodeQuery

Amazingness

Adds a widget to the Dashboard showing your NodeQuery monitored server details. Requires an API key from NodeQuery. This is an unofficial plugin.

[TNM] Server Status and Load Average vs Dashboard Widget NodeQuery