Nicolas Bouliane

This plugin will display the administrator’s email on the dashboard so other users can easily contact him.

Dashboard Admin Email

Displays the administrator's email on the dashboard

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 …

Dashboard Admin Email vs [TNM] Server Status and Load Average