Mac: There are plenty of tools to help you focus with a little ambient sound, whether it's raindrops falling, the buzz of a cafe or something else. Noizio is a little different, because it brings those sounds to the desktop in the form of a menubar app for your Mac.
Once installed, Noizio lives in your menubar. From there you can toggle audio on and off, select the ambient sounds you want to hear, and even mash up multiple sounds to get exactly what you're looking for. Maybe you want a litle cafe buzz and some rain behind it, or the sound of a crackling fire with wind whipping outside the windows? Adjust the sliders until you have the right mix, and then get to work. If you prefer, you can tell the app to start on startup, so you always have it running in the background.
Noizio is free and available now in the Mac App Store. Hit the link below to try it out.