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.

Lungy - Next-gen breathing exercises that respond to every breath

Noizio - Feeling that the noise of the big city is too much for you to bear?

Online Breathing Timer - Breathe to become calm and regain focus

zenmix.io - Ambient background sound generator

Breathing exercises - Breathing exercises to calm down and practice diaphragmatic breathing.