MacAppStuff Scatter creates 'windows' out of your pictures (JPG or PNG) which can be placed anywhere on the screen (they do NOT sit behind desktop icons). These pictures can be resized, have transparency and include a text label if desired. You can create desktop wallpaper using these pictures and a background wallpaper of your choice. The app can be started automatically when your Mac starts (see Preferences). Original pictures that you use with the app are not altered, they are copied by the app.
14 day trial, only allows the creation of 3 window pictures.