Reel is a jQuery plugin (11.7 kb minified) to generate 360° views either from images in a sprite or from a panoramic image that has been stitched together.
It is a great alternative to Flash or Java as it does not require any browser plugins or extensions and it supports mouse wheel and touch devices. It is cross browser compatible and even works in IE6.
The code is also available on a CDN. There are many options available in the API to customise the plugin and it is well documented.