Miriam de Paula

WP Coming Soon is a plugin that adds a countdown clock in the Coming Soon page. This plugin uses Keith Wood jQuery plugin. See it at: http://keith-wood.name/countdown.html.
[BASIC USAGE]
Put this <code>if ( function_exists('get_countdown')) get_countdown();</code> where you want to display the countdown clock…
If you want to use the countdown timer within a page or page template, you can use the shortcode <code>[wp_coming_soon]</code>

WP Coming Soon

WP Coming Soon is a simple plugin that adds a countdown clock in your Coming Soon page... Nothing more!

enclick

Display a clock on your sidebar set automatically to your location’s timezone. Select from a choice of clocks, colors and sizes.
<ul>
<li>A wide range of analog and digital clocks. See screenshots tab or designs shown in <a href="http://localtimes.info/getwidget/" title="Clock Widget Designs" rel="nofollow ugc">localtimes.info/getwidget</a></li>
<li>Choice of size, colors of text, border and background,</li>
<li>Automatic adjustment of daylight saving time from the <a href="http://localtimes.info" title="Local Times round the world" rel="nofollow ugc">localtimes.info</a> servers</li>
<li>HTML5 responsive plugin, detects device and serves flash, html5, javascript progressively</li>
<li>Easy addition of multiple clocks</li>
</ul>

Local Time Clock

Display a clock on your sidebar set automatically to your location's timezone. Select from a choice of clocks, colors and sizes.

WP Coming Soon vs Local Time Clock