Next to the Voyager twins, I think Cassini might be the best satellite NASA ever launched. Certainly takes the best pictures. Tumblr’s own staceythinx has an iPad app called Cassini HD that features even more photos, plus color, plus science.
Many thanks to jtotheizzoe for mentioning our app! We happen to be very busy finishing up a new update that will feature more than 20 new images. Look for it soon!