John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Folder Marker - Change folder color in two mouse clicks for easy at-a-glance identification.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.
Folder Painter - Folder Painter is an easy to use Portable Freeware program, which allows you to change the color of the icon representing a chosen folder to any color you like
Wallpaper Cycler - NuonSoft WallpaperCycler is a powerfull utility to manage all your wallpapers and to automatically cycle between your wallpapers.
Folder Colorizer - Windows Explorer is too boring? Color it up!