Overlap Wallpaper displays a photo on the desktop wallpaper in overlap manner, so that one can have the photo of loved ones on different wallpaper images on desktop. It is a free, but ad-supported desktop customization application that's portable.
Here are some screenshots to illustrate the features and user interface of this application:
Compact and tool that overlays a photo on the desktop wallpaper and lets you specify its transparency. Screenshot of Overlap Wallpaper - 1069px · 1125pxAdds a photo overlay on top of desktop background. Screenshot of Overlap Wallpaper - 1069px · 1125pxOverlap Wallpaper: User interface. Screenshot of Overlap Wallpaper - 1206px · 1062px