AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
Wallpaper Engine - Wallpaper Engine enables you to use live wallpapers on your Windows desktop.
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
Lively Wallpaper - What is it? Lively is a Free and Open-Source Software (FOSS) for animated desktop wallpapers.
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.
ScreenPlay - Open-source and cross-platform Wallpaper, Widgets and AppDrawer app.