Background

BackgroundCheck - Automatically switch to a darker or a lighter version of an element depending on the brightness of images behind it

BackgroundCheck is a javascript brightness detection plugin. It will automatically switch an element to its darker or lighter version depending on the brightness of images behind this specified element.  

Backstretch - jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image

Backstretch is a simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any page or element. The image will stretch to fit the page/element, and will automatically resize as the window/element size changes. Images are fetched after your page is loaded, so your users won't have to wait for the (often large) image to download before using your site.  

qpScroll - A super quick way of putting together a simple parallax background for a page

qpScroll is a jQuery plugin that creates a parallax background for any page or div. It is super simple to setup. It can be added to any existing page without the need to change the HTML mark up.   the three major settings are: how much faster/slower do images move compared to the scroll speed how much faster/slower does each image scroll compared to one before it how much does each image cover the one before it  

blur.js - jQuery plugin that produces psuedo-transparent blurred elements over other elements

blur.js is a jQuery plugin that produces psuedo-transparent blurred elements over other elements.  

Wallpaper - A jQuery plugin for smooth-scaling image and video backgrounds

Wallpaper is a jQuery plugin for smooth-scaling image and video backgrounds.  

MaxImage2 - jQuery Cycle plugin as Fullscreen Background Slideshow

Maximage2 is a fullscreen background slideshow plugin that uses jQuery Cycle plugin for it's slideshow functionality. This plugin can be used as a tool to make almost anything a fullscreen background element very easily, inlcuding HTML5 video.  

BigVideo.js - The jQuery Plugin for Big Background Video (and Images)

BigVideo.js makes it easy to add fit-to-fill background video to websites. It can play silent ambient background video (or series of videos). Or use it as a player to show video playlist. BigVideo.js can also show big background images, which is nice to have for showing big background images for devices that don’t have autoplay for ambient video.  

Website Backgrounds - lots of free background designs for download

Website Backgrounds contains all kinds of background designs, including Colorful, Abstract, Grunge, Nature and textures.  

jQuery.VideoBG - an HTML5 video background plugin

  jQuery.VideoBG plugin enables web designers to use an HTML5 video as a background or any div to a website very easily.