There are lots of desktop wallpaper managers out there, but not one has what I would've considered the most intuitive way of changing wallpaper, which is to drag and drop a picture from a folder or one's browser onto a app, and that picture immediately being assigned to the desktop as wallpaper.
Having recently joined the multiple monitor fraternity, I got to thinking that it would be extremely handy to have a little app that can either dock to the side of the screen or maybe come up with a hotkey, that has a little screen per monitor where I can drop a picture and have that picture assigned to the monitor that little screen represents.
The reason I'd class this as a coding snack rather than something more complex is that the app wouldn't have to maintain a list of desktop picture folders, be able to change wallpapers randomly or anything like that - just the ability to assign a dropped picture to the relevant monitor.
Hope that makes sense!

A nice-to-have would be to be able to set up whether to tile, stretch to fill or stretch proportionally the picture per monitor.
Thanks, and I want to add I think you guys are awesome!