Wallpaper Master

Wallpaper Master is a powerful and highly customizable desktop wallpaper manager and cycler.

Major features - Freeware version:

• Store multiple wallpaper lists as different categories/libraries - up to 5000 images per category!
• The ability to rate wallpaper, so better wallpapers are chosen more often.
• Customizable Global Hotkeys - Quickly change/clear the wallpaper with any key combo.
• Very high quality resizing of images to fit the screen optimally and keep their aspect ratio.
• Analyse the wallpaper and automatically choose between Resize, Tile, Center or Stretch.

...And many many more!