LumoTray - A multi-monitor wallpaper and fullscreen manager and menu builder
My Daily Wallpaper - Wanna download automatically every day a new and beautiful wallpaper for your Windows desktop?
Ultramon - UltraMon is a piece of software built to help with the management of multiple screens on the same computer system. Without software like this, taking full advantage of an expanded desktop space can be difficult.
Walyk Wallpaper Changer - Walyk Wallpaper Changer allow you to change your wallpapers automatically or manually.
Superpaper - A cross-platform multi monitor wallpaper manager.
Kuvva - Kuvva is the source for beautiful wallpapers.