Mex Avila

You can create your clusters an easy way.
<ol>
<li>Go to Clusters</li>
<li>Select the options</li>
<li>Copy the shortcode </li>
<li>Paste in your post/page</li>
</ol>

Pixel Cluster

A small plugin for create clusters of posts.

Andrew Norcross

Liquid Web

mallardduck

Do you run your WordPress in a Cluster based setup? 
Ever need to know what server your request came from? 
Don’t want to have to dig into server access logs to do it?
Look no further, this is just the plugin you’re looking for.
Hello Server adds a menu-node to the Admin Toolbar that tells you what server your request was sent from! In the new Hello Server menu you’ll find the current servers hostname and IP!

Hello Server by Liquid Web

This is a simple plugin that tells you what server your WordPress is running on. It's super useful for when you run WordPress in a clustered, or  …

Pixel Cluster vs Hello Server by Liquid Web