Relax Melodies is a collection of audio files designed to help you relax and fall asleep. Essentially a set of ambient sounds, Relax Melodies is designed to mask background noise and help you reach a more tranquil state of mind. There's a free version of Relax Melodies for experimenting, and an upgrade to a full version for $4.99.
Noise distractions are a common cause of sleep disturbances, and Relax Melodies masks those background sounds with a soothing, repeatable soundtrack that helps you relax more and drift off to sleep. Composed of sounds like a flowing river, rain, wind chimes, and so on, the 50 ambient sound tracks are designed to be there, masking sounds, but not to distract you. You can mix together the sounds you like the most to create custom soundtracks, too. The Relax Melodies interface presents a graphical view of the sounds included with the package, and you select what you want and then let it play.
People have used pink noise generators for years to help them relax and sleep. Relax Melodies is a convenient way to do exactly that for not a lot of money. If you are in a noisy environment or have trouble relaxing, it's worth trying Relax Melodies to see if it can help.