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

Box Breathing - Breathe in sync with this to calm yourself down

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.

Breathe2Relax - Breathing exercises to practice diaphragmatic breathing.

zenmix.io - Ambient background sound generator

Othership - Othership offers 500+ music-driven guided breathwork classes to lift you up and ground you down: kickstart your day, cultivate focus, fight fatigue, sleep deeper, regulate your emotions, and learn the science-backed how + why of breathing mechanics.