gjay is described as 'Gtk+ DJ; friendly GUI for generating great-sounding playlists across large music collections. Song matches are based on BPM, frequency, and user categories ('color' and rating). Works with mp3, ogg, and wav' and is an app. There are five alternatives to gjay for a variety of platforms, including Linux, BSD, Mac, Windows and KDE Plasma apps. The best gjay alternative is Strawberry, which is both free and Open Source. Other great apps like gjay are Rhythmbox, DeaDBeeF, Jajuk and JuK.