Free White Noise: Natural sounds to block noise, help sleep & focus!

There are a lot of white noise apps available in the App Store, but this one is by far the most robust. -TUAW.com (The Unofficial Apple Weblog)Relax, block noise, and increase focus with a wide collection of authentic live-recorded white noise sounds from around the world. Image credits: http://www.whitenoisehqapp.com/image-credits/