A Soft Murmur - Ambient sounds to wash away distraction.
Moodwill - Create and listen for free to your perfect nature sounds environment with music to help you concentrate, relax, sleep and overall feel better.
Rainy Mood - Rainy Mood is the world's most popular rain simulator. Sleep, study, and relax with the sound of rain.
Defonic - Create a unique sound environment at home or in the office
Noizio - Feeling that the noise of the big city is too much for you to bear?
zenmix.io - Ambient background sound generator