A variety of decorations: drag-over, marquee, hovering labels...
I've been tinkering with a class I originally wrote in order to provide some drag-over effects (and then re-used for other types of highlighting) where I didn't have control over the target component. I got it out again as a solution to provide stationary labels on a horizontally-scrolling component.
Some recent web animations got me to wondering if I couldn't do similar effects with the old decorator class. I've put the results in a little article here: