Veja o Trocador de papéis de parede da área de trabalho BioniX :
BioniX Desktop Wallpaper Changer is the most popular desktop wallpaper changer/wallpaper manager for Windows. It is FREE and jam-packed with features that no other concurrent wallpaper manager can offer!
Compatible with all Windows systems - From Win95 to Vista and Windows 7, all operating systems are supported.
BioniX Desktop Wallpaper Manager supports the following image formats: JPG (JPEG, JFIF, JPE), PNG, GIF (static and animated), BMP, ICO, WMF, EMF. Just drag and drop any image over BioniX's interface and it will be automatically included in the playlist.