CollageIt - CollageIt is an easy-to-use and automatic collage maker, which makes photo collage automatically.
Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
PhotoSpills - Easy to use PC collage software with unlimited design possibilities.
ScreenPlay - Open-source and cross-platform Wallpaper, Widgets and AppDrawer app.
Collagerator - Create amazing photo collages in few mouse clicks. Ready for download for Mac OS X and Windows.
Lively Wallpaper - What is it? Lively is a Free and Open-Source Software (FOSS) for animated desktop wallpapers.