From Psycho Bear Studios:
Screen Bling brings you hundreds of awesome and free HD retina wallpapers for your icons. With the Screen Bling app, you can select from a nature wallpaper to abstract art. Your wallpaper backgrounds will look awesome and so will every icon. Why settle for a common background for your app icons when you can use high quality HD Retina wallpapers and make your iphone, ipad, or ipod really look cool?