Calm - Calm.com can help you reduce stress and increase calm.
MyNoise - Custom shaped online noise machines. Many Many generic sounds
Calm Radio - Calm Radio is a music streaming alternative that offers calming music. Listen to classical and relaxation music for work and sleep, online jazz music with nature sounds, meditation and world music available on our Calm Radio app.
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.
streamsquid - StreamSquid is a free music streaming service, that let you discover and share the music you love.