Spotalike - Spotify playlist with similar songs, according to Last.fm
Widget Web - Widget Web is a handy application that allows you to view the content of web pages in a widget on your iOS device’s home screen.
MusaicFM - An iTunes like screen saver based on Spotify and Last.fm
Widgeridoo - Custom and pre-made widgets for iOS and macOS
Bowtie - Bowtie is a desktop accessory that allows you to see and control your music (iTunes, Spotify...
My Widgets - My Widgets is a fully-featured application that lets you customize the Home screen with many widgets having various functions.