Artwork One by Michal Tamas, for the design language the face follows: the cover full screen and blurred, the controls on frosted glass, the colours sampled from the artwork.
Now Playing by patrickkfkan, for the screen set the face follows: now playing, browse, queue, an idle screen with clock and weather, an action panel. The now playing screen, its controls and the clock are in the face today; the others are to come.
PeppyMeter by project-owner, for the theme format Glass reads and the face inherits.
Volumio, the player this is a face for, and its community, whose themes and reports shape it.