FranticFish - 10:30 am on Apr 22, 2011 (gmt 0)

There's a fantastic interactive animation on Google's home page today, with various mouseover areas triggering actions.

I initially thought this was Flash but it isn't - all the frames are sprites (PNGs) and a mix of CSS and Javascript is driving the animation.

You can see one of the images at [google.co.uk...] - and from this you can see that the sprites are shared.

Does anyone know of any software that helps you do this?