A free program for Android, by Live Wallpapers 3D.

Cat Live Wallpaper – a wonderful collection of beautiful pictures of cats and dogs, which are guaranteed to make you happy and cheerful! It has a special function that simulates water drops, water ripples, and waves on your phone screen. You will not only enjoy the beautiful pictures, but you will also see a unique and lovely live wallpaper on your screen!

You can choose your favorite picture and set it as live wallpaper for your phone or tablet. You can also choose between cats and dogs. 

Cat Live Wallpaper has been designed to be compatible with Android phones and tablets.