This app allows you to quickly rate your iTunes song both from the app and from its Notification Center widget. You can even do it from the Touch Bar!
• Glance and rate a song from the Notification Center widget.
• Click on the album artwork to play or pause a song.
• Rate songs with the Touch Bar from the app.
You can enable the widget from the Notification Center or opening the app and pressing Command+N and enabling it in System Preferences.
Suggestions are welcomed at @pvieito.