[Trotter]

I came across this while surfing my tech news. It is definately worth a look-see.

moo.fx is a superlightweight, ultratiny, megasmall javascript effects library, written with prototype.js.

It's easy to use, fast, cross-browser, standards compliant, provides controls to modify Height, Width, and Opacity with builtin checks that won't let a user break the effect with multiple crazy clicks. It's also optimized to make you write the lesser code possible.

Here's a link to the page:
http://moofx.mad4milk.net/#introduction

You have to have JavaScript enabled (if you are using NoScript). Click the bars to see the effects, as well as the demos.

Oh, and it's free.