Qcycle is a project mainly written in JavaScript, it's free.
A wrapper plugin for jquery.cycle that preloads and dynamically adds all slides
qCycle can be used to queue load a set of images for use in a banner or slideshow. It helps keep your markup clean by only requiring you to have one image in your source—this image is your default image.
qCycle is a wrapper for the jquery.cycle plugin. jquery.cycle IS REQUIRED. Get it here: http://www.malsup.com/jquery/cycle/