Back in the day I was pretty proud of this.
A dynamic, customizable mp3 player. The impetus for this came from the desire for a full screen, modifiable jukebox-like front end. This player allows you to re-arrange the placement, size, and color of all the components in a skin-able sort of way. I also wanted features like the scrolling album covers and scrolling song/artist titles, and the ability for the player to arrange things the way I want.
There is video of this in the program reel video on this page demonstrating the skin design.