Phillip.Gooch

Backdrop is a site background customizer with power greater than the mere stock background selector included with WordPress. What can backdrop do that the default can’t? I’m glad you asked…
<ul>
<li>More than just boring backgrounds, flexible backgrounds, parallax backgrounds, even sliding backgrounds are stuffed in here too (don’t worry, the boring ones are still around as well).</li>
<li>Options, options, options! More options that you can shake a well sharpened stick at.</li>
<li>Uses the WordPress customizer interface so you can see your changes as you make them.</li>
<li>One click HiDpi (or retina) backgrounds, make it look all purdy on that fancy screen.</li>
<li>Theme schmeme, we don’t need support in your stinkin theme, backdrop can force it’s way into nearly any theme.</li>
<li>Calls external JS and CSS files that are appropriately cached.</li>
<li>Advanced options for those in the know with CSS.</li>
<li>Built for the smoothest animations possible.</li>
</ul>
Note: Starting with version 2.0 Backdrop will no longer work it’s magic with older versions of Internet Explorer (before version 10). If you want to support animations on older versions of IE then please use Backdrop 1.X.
Note: Your Backdrop settings will not be transfered from 1.X to 2.X, you will need to re-set your backdrop on update.

Backdrop

Backdrop is an improved site background customizer allowing for all manner of fancy things.

Sarven

Easy Fullscreen Slider allows you to add background fullscreen slider or single fullscreen image. You can set default settings for all posts/pages or set individually settings for each page/post. 
After activation you must change the disable option and add images.
This plugin uses jQuery library <a href="http://buildinternet.com/project/supersized/" title="Supersized webpage" rel="nofollow ugc">Supersized</a>.
<h4>Options</h4>
Transition effect:
<pre><code>'none' - No transition effect
'fade' - Fade effect
'slideTop' - Slide in from top
'slideRight' - Slide in from right
'slideBottom' - Slide in from bottom
'slideLeft' - Slide in from left
'carouselRight' - Carousel from right to left
'carouselLeft' - Carousel from left to right
</code></pre>
Transition speed:
<pre><code>Speed of transitions in milliseconds
</code></pre>
Slide interval:
<pre><code>Time between slide changes in milliseconds
</code></pre>
Controlls:
<pre><code>Show arrows navigation
</code></pre>
Autoplay:
<pre><code>Determines whether slideshow begins playing when page is loaded
</code></pre>
Disable:
<pre><code>Off slider
</code></pre>
Progress bar:
<pre><code>Show progress bar
</code></pre>
Thumbnail navigation:
<pre><code>Show thmubnails
</code></pre>
Background pattern:
<pre><code>Add background pattern
</code></pre>

Easy Fullscreen Slider

An easy-to-use WordPress fullscreen slider plugin for Supersized.

Backdrop vs Easy Fullscreen Slider