Samsung
Music Hub launched in 2012 around the same time as the Galaxy S III flagship phone. It was sort of a mix between Spotify and iTunes. You could purchase and download individual tracks and albums and pay $10 per month for unlimited streaming.
Samsung's Music Hub page says you can still download the app before July 1 and use it to buy music.
This year, Samsung launched Milk Music, a free streaming radio app that's sort of like Pandora. With Milk, you tell the app what kind of music you want to listen to and it creates a customized radio station. However, there are rumors Samsung will start charging for Milk soon.