Moodwill is a free web app made by a nature lover. It provides high quality sounds of the nature online without requiring any download. Moreover, you can listen to any music you'd love to hear on top of the nature sounds for a better experience.
Free, high quality sounds, I JUST LOVE IT!
Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
Plum Village - Free mindfulness app w/ Zen Buddhist meditations + teachings
MyNoise - Custom shaped online noise machines. Many Many generic sounds
Calm - Calm.com can help you reduce stress and increase calm.
zenmix.io - Ambient background sound generator
Headspace - Meditation made simple. Brilliant things happen in calm minds.