Hover Over Identify Widget

Hello,

I was wondering if anyone knows of a widget that allows users to hover over features on a map and have the features light up or change color and also display attribute information without having the user actually click on the map? I think I have seen this before. Below is an example using silverlight (I think):

http://gistech.countyofkane.org/kanegis/kanegis.html (click to turn on County Board Districts and then hover over the map).

Thanks for the help!