GreatBlakes

This is a WordPress plugin that adds advanced load timing to each page. Know exactly what is causing slow (or fast) page loading on every page. It’s like doing a lightweight and fast speed test on every page! It does not require any settings and is displayed at the bottom-left of the page. The overall load time is shown initially, and when clicked, the advanced load times appear.
The processes being timed are: 
Redirection (and quantity) 
App Cache 
DNS Lookup 
TCP Connection 
Server Request 
Server Response 
DOM Processing 
Page Load
This timing only display to site admins, and can also be triggered by adding “?debug” at the end of the URL. Considerably slow or fast times are dictated with coloring.

Simple Site Speed

Add page load times for admins on the front-end.

jystewart

When running wordpress for short term projects it can be useful to be able to count down to 
the end point of the project. And often you’ll want to close comments after that point.
This plugin will allow you to do that, providing a hook to close comments and a helper to 
show the countdown (in days) on your site.
To show the countdown add the following to your theme:
Please Note: This plugin is only tested on PHP5 and may not work on earlier versions.
<h3>To Do</h3>
<ul>
<li>Add automated tests</li>
<li>Solicit user feedback on further options</li>
</ul>

WP Countdown To

Provide a count down to a set date and optionally close comments after that date.

Simple Site Speed vs WP Countdown To