Fonte: http://www.sitepoint.com/responsive-fullscreen-background-image-plugins/
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Vegas is a jQuery plugin to add beautiful fullscreen backgrounds to your webpages. You can even create amazing Slideshows.s
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2. Backstretch
A simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any page or element
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3. Supersized jQuery Plugin
Full screen background slideshow plugin for jQuery
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4. jQuery tubular
Tubular is a jQuery plugin that lets you set a YouTube video as your page background. Just attach it to your page wrapper element, set some options, and you’re on your way.
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5. mb.jquery
A good way to have extra content or a navigation tool in your page.
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CSS Only Techniques
There are also a CSS only techniques if you want courtesy of my good ole Chris Source Demo.