PeoplesGeek

Monitoring services like www.siteuptime.com or www.montastic.com require a page on your website to monitor.
This plugin provides a virtual target for your monitoring services that does not invoke other plugins (specifically avoiding the Google analytics plugins so that your statistics are not skewed by monitoring calls) 
The two targets provided for the monitoring service are:
<ul>
<li>monitor.htm – via .htaccess and does not use WordPress (but does use PHP)</li>
<li>monitorWP.htm – via WP and so tests the Database etc is working</li>
</ul>

PG Monitor

A virtual target file to be read by monitoring services instead of using a static HTML page.

Daisuke Takahashi

Do you want to monitor your server without using SSH?
Don’t you know how to use difficult commands? (looks like a spell!)
<blockquote>
OK! Leave all to this plugin!
</blockquote>
“Server Status” adds widget like ‘uptime’ command in Dashboard and Network Admin Dashboard.
<h3>Notice</h3>
<ul>
<li>Currently, only RHEL/CentOS is tested. And OS X is tesing now! (The number of tested OS will increase shortly.)</li>
<li>PECL Zend OPcache users, please add server-status.php to black list! Otherwise, there must be segmentation fault. 
This troublesome process isn’t required on PHP5.5!</li>
<li>PHP 5.2 users, your version of PHP is no longer supported.(<a href="http://www.php.net/eol.php" rel="nofollow ugc">Detail</a>) If you’re using such older version, this plugin nags at it!</li>
</ul>

Server Status

thank you a lot for this work, keep it up!

a little too much info, but great for monitoring while dev/stage

Show server information widget in Dashboard and Network Admin Dashboard.(Currently, only RHEL is tested)

PG Monitor vs Server Status