Calm Radio is described as 'Relaxing internet radio featuring over 185 channels of New Age, Classical, Jazz, and Contemporary. A multi mixer allows soothing atmospheres to be added for a tailored listening experience' and is an app in the Audio & Music category. There are more than 50 alternatives to Calm Radio for a variety of platforms, including iPhone, Android, Online / Web-based, iPad and Android Tablet. The best alternative is A Soft Murmur, which is free. Other great apps like Calm Radio are Calm.com (Freemium), GitHub Audio (Free, Open Source), Tide (by Moreless) (Free) and Noizio (Paid).
ANoise is a minimal ambient noise player to help you focus on your productivity! Just open the Ubuntu sound indicator and choose your noise: Coffee Shop | Fire | Forest | Night | Rain | Sea | Storm | Wind
Blissful noises is a free online background noise generator. It offers various relaxing sounds divided into environments that helps you meditate, focus or chill like white noise, binaural beats, rain, thunder, bird, ocean, etc.