Brain.fm - Music designed for the brain to enhance focus, relaxation, meditation, naps and sleep within 10 - 15 minutes of use.
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.
NoisyLoop - Play urban soundscapes in a loop
GetWorkDoneMusic - Music to help focus and get work done.
Zenisounds - Zenisounds is an online platform that lets you mix ambient noises to create the ultimate relaxation playlist for free.
Super Creative Radio - Nonstop curated music for creative work