You know how Instagram made everybody a "photographer"? Pacemaker could just as easily make everyone a DJ. Even if your IG game has a four or five figure follower count, chances are, you're not getting paid the big bucks to shoot weddings or ad campaigns. But even if you're not a pro-photog, you're still looking at the world through the eye of a photographer, and that's both exciting and special. Pacemaker will make you listen and appreciate music like you're a DJ, even if it won't necessarily turn you into the next Calvin Harris. It pulls from the 20-million track Spotify library and allows you to mix up songs with a simple, beautiful, intuitive interface. Download here for free.