The Beautiful Music Player with Material Design : Jair Player
Besides the Material Design elements seen in the interface, Jair Player also supports Gapless Playback, individual equalizer presets down to a song, Lyrics fetching, folder browsing, scrobbling and other features, you can also edit meta tags and rename the song details. There is no need to download extra tagger applications with this player, it's an small package deal.
In addition to that bundle of goodies, Jair Music Player will let you customize the looks or the theme of the application with various colors and you can make your own combination. The developer of this app +Akshay Chordiya is also very serious about it, he listens to every bug and kill it.