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!
Sounds of Earth - Listen to relaxing ambient sounds of nature
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Earth.fm - Earth.fm is a non-profit, growing library of pure, high quality nature sounds from around the world.
MyNoise - Custom shaped online noise machines. Many Many generic sounds
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zenmix.io - Ambient background sound generator