Soundbar - A lightweight SoundCloud player for Mac
Defonic - Create a unique sound environment at home or in the office
Sleeve - Your currently playing track displayed right on your desktop
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.
Cumulus - A SoundCloud player that lives in your menubar.
Focus Noise - Productivity sounds and color noises to stay focused at work