Popup Music player is a floating widget based Default music player.

The Fixed Widget is located Top or Bottom, automatically disappear.
The Moveable Widget is located Top or Bottom, automatically disappear.

You can adjust the position within the screen and Time.

If you click 'Start Service', pop-up appears

Provides Nine kinds of skins to choose their preferred skin.

A free music player with all features in one package

NRG Player free music player with equalizer, adjustable interface and playback from folders. NRG Player plays mp3, ogg, m4a, 3gp, wav and other standard Android audio file types. You can select songs from folders, albums, artists in a simple way.

Tune is basically what you always looked for. It’s the best, absolutely free alternative to Spotify.