As I was visiting Lime.com I found their meditation rooms. They play music while showing pictures along a certain theme. They have a space room with some rather interesting and invigorating sounds, a winter room, a floral room, a water room, and a zen room. I’m listening to zen right now to see if it helps me concentrate on my studying. The space room, while appropriate, was just too distracting. lol
Take a look and give them a try. If nothing else, they have pretty pictures!