I found the Isotope JQuery plugin a few years ago and was immediately impressed with the filtering functionality and animation it provided on the front-end. I never really had time to sit and play with it until recently. I can now say I am in love with it. The plugin David DeSandro has built is probably one of the most enjoyable plugins I have used in a really long time. The amount of "WOW" you can add to a site with such minimal effort is really amazing.