PictureShare.net Wallpaper Manager 4.0
This wallpaper manager provides image rotation, transition fade, timed switching, image ranking and a transparent interface.
You can add single files or whole folders, and it includes network support. PictureShare.net Wallpaper Manager is compatible with the PictureShare.net Image Delivery Service.
The Wallpaper Manager itself is free but after 30 days or 20 images received, a yearly subscription is required to continue receiving new images.