CoverWall displays your covers in the backgorund. It's like a giant, cool wallpaper, and all you have to do, is just start the application, and enjoy your artworks.
It helps to rediscovering your long forgotten albums, or just helps to choose what to listen when you have absolutely no idea.
Also, you can set up the animation types, and several things in the settings menu.
If you like, try out the iPad/iPhone version of it.
NOTE: If you want to turn off the background, then select exit from the menu bar.
If you have any suggestion or problem about CoverWall, please feel free to write an e-mail to me. You can do it easily from the about window. Thanks.