Youtube Music, Spotify, Apple Music, Last.fm, MusicBee, AIMP, Rhythmbox, Funkwhale, Pandora, Clementine, Strawberry, Quod Libet, 7Digital, Senuti, expod, dTunes, MusicPlus, Beatler, Panamp, GetFreeMP3, Ziepod, Amazon Cloud Player are some alternatives to Napster.