zenmix.io - Ambient background sound generator
Defonic - Create a unique sound environment at home or in the office
TinglyTube - TinglyTube is a free platform for uploading and watching ASMR videos, created by a 14-year-old ASMRtist in 2018. Watch on any device, no more apps, and no need to pay to sleep.
SoundDrown - Ambient sounds to help you focus, relax, and escape
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.
A Soft Murmur - Ambient sounds to wash away distraction.