Nuvola Player runs web interface of cloud music service in its own window and provides integration with a Linux desktop (system tray, Ubuntu sound menu, dock menu and notifications). Currently supported services are Google Music,Grooveshark, Hype Machine and 8tracks. More information about features.
With Nuvola Player you will never accidentaly close web browser with playing music and window with your music is easily accesible from your dock/task bar instead of tab bar of your web browser.
Nuvola Player shows notifications with currently playing song (Ubuntu, GNOME Fallback mode, GNOME Shell).
MPRIS interface is used by applets, plasmoids and other applications (called MPRIS clients) to control running media players. GNOME Shell Media player indicator and Ubuntu sound indicator are good examples of MPRIS clients.
Dock Manager interface
Dock Manager interface is provided by docks to facilitate extra customization of dock items. Google Music Frame adds extra menu items to control playback (play/pause, previous/next song) or exit application. Docky, Avant Window Navigator and DockBarX are well known examples of Dock Manager compliant docks.
Unity launcher integration
Nuvola Player adds extra menu items to control playback (play/pause, previous/next song) or exit application.
Google Music Frame is able to handle multimedia keys in GNOME (managed by GNOME Settings daemon) and unmanaged keys (not blocked by other applications).
Pause key binding
Google Music Frame is able to assing play/pause action to standard Pause key (usually located above the group of Home, End, Page Up, Page Down keys). This feature is designed for users without multimedia keyboard and is disabled by default. To enable it open the Preferences dialog.
Hide on close
Nuvola Player can be configured to hide the main window whe close button is pressed instead of exiting.
GMF provides tray icon for environments without Ubuntu Sound Indicator (e.g. GNOME Shell, GNOME Fallback mode). The main window is hidden to tray icon if the close button is pressed while the music is playing.