The DesktopSlideshow widget (for the Yahoo Widget Engine / Konfabulator) is a Windows-only widget that periodically changes your desktop wallpaper to different images in a folder that you specify.
Now in version 2.0, DesktopSlideshow has been updated to automatically scale images to fit the screen while preserving the aspect ratio. Also, more image formats are now supported: bmp, jpg, png, and tiff (filename .tif or .tiff).

Since I’m not a graphics programmer, Desktopslideshow requires Imagemagick for scaling images and converting non-bmp images. Read about it and download and install it from www.imagemagick.org. For DesktopSlideshow, find and install the Windows binary called ImageMagick-currentversion-Q16-windows-static.exe. Then when you first run DesktopSlideshow, go to the preferences and tell DesktopSlideshow where to find ImageMagick.

If you don’t install ImageMagick, DesktopSlideshow will only work with .bmp images, and will not scale them to fit the screen.

Other usage notes:

• Set your Windows wallpaper setting to “center”, not “stretch”, or Windows will mess with the aspect ratio
• You can manually force a wallpaper change by double-clicking on the slide projector
• DesktopSlideshow doesn’t work when it’s set to only “Show Only in Heads Up Display”

Enjoy! Download it here. I hope to have it up at the widget galleries soon.