Superfunhappyslide is a project mainly written in JavaScript, it's free.
a 100% width jquery slider plugin
A jQuery carousel slider plugin, which works with percentages instead if pixel value, so it can span the whole browser window!
Include jquery, superfunhappyslide.js and superfunhappyslide.css
$('.my_selector').superFunHappySlide(options)first_slide: 0, // integer or 'random', default: 0
directional_navigation: true, // boolean, default: true
bullet_navigation: true, // boolean, default: true
animation_speed: 300 // integer (in ms), default: 400