Spotalike - Spotify playlist with similar songs, according to Last.fm
Musish - A web client for Apple Music
MusaicFM - An iTunes like screen saver based on Spotify and Last.fm
feverTunes - A web player for Apple Music support adding tags to playlist
Bowtie - Bowtie is a desktop accessory that allows you to see and control your music (iTunes, Spotify...
Apple Music - Apple Music app combines your personal iTunes library with Apple's music subscription service. Music you have purchased from the iTunes store, or synced over from other sources, is available in the "Library" tab. Read more about Apple Music.