WallpapersEveryday - Gorgeous wallpapers on your desktop in just one click or auto-delivered at chosen time intervals.
AeroWallpaperChanger - AeroWallpaperChanger is another "wallpaper changer" software for Windows 7.
Ruler for Windows - It's a screen ruler for Windows.
Becrux Wally - Wally is a Qt4 wallpaper changer, using multiple sources like files, folders, FTP remote folders, Flickr, Panoramio, Ipernity, Photobucket, Buzznet, Picasa, Smugmug, Google, Vladstudio and deviantART images. Now it's available in many languages!!
Fondo - Find the most beautiful wallpapers from Unsplash.com
Random BackGround - Random BackGround desktop wallpaper slideshow with advanced features for Windows