These are useful jQuery plugins for image background.
1. Vegas Background SlideShow jQuery Plugin
2. BACKSTRETCH
Backstretch is a simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any page or element.
3. Mb Background Gallery
4. jQuery tubular
5. VIDE
6. jQuery Unobtrusive Background Image Switcher
7. FullScreen Background / Gallery - Image and Video
8. BACKGROUND TRIP
9. Ultimate Media Background for jQuery

You can display full screen video, image, and/or color backgrounds.
10. Backslider - Fullscreen Background Image Slider
Backslider – Fullscreen Background Image Slider is an elegant and flexible solution for creative designs.