wpeffects

RS Coming Soon plugin has super admin panel where your customize anything including fonts and translate to any language and control saved emails from visitor and export to csv formate even you can remove emails from admin panel. Its fully SEO optimized under construction plugin
See live demo here: http://themebon.com/rs-coming-soon/
Features
<ul>
<li>Super easy installation.</li>
<li>Works with any theme.</li>
<li>Fully Responsive.</li>
<li>Fully Customizable.</li>
<li>Amazing cloud effects.</li>
<li>Seo friendly.</li>
<li>Powerful security.</li>
<li>Form validation.</li>
<li>Show success message after submit.</li>
<li>Store emails in database.</li>
<li>Show emails in dashboard.</li>
<li>Remove emails from dashboard.</li>
<li>All major browser supported.</li>
<li>and many more.</li>
</ul>

RS Coming Soon

RS Coming Soon plugin Creates a page for your Website while it's under construction and collects emails from your visitors and show in dashboard.

sierramike

This widget allows you to display a JQuery responsive countdown timer on your website. You can use it as a widget or include it wherever shortcodes are supported.
It comes out of the box with french and german translations.
The widget contains media queries in its css stylesheet. You can edit it to suit your needs.
This widget also supports shortcodes!
Just add a [smcountdown timerdate=’xxx’] shortcode to any of you posts and you’ll get a responsive countdown timer! 
The shortcode supports one parameter: timerdate. 
* timerdate indicates the target date until which the timer counts down
Shortcode usage samples : 
[smcountdown timerdate=’2015/12/31 23:59:59′] 
Displays a countdown timer until Decembre 31th of 2015, 23h59m59s.

SM CountDown Widget

Displays a responsive JQuery countdown timer.

RS Coming Soon vs SM CountDown Widget