The Base Radio - The Base is Star Citizen's premier Online Radio Station.
Gnoosic - Even if you don't know what you are looking for - gnod will find it.
TuneIn Radio - With TuneIn Radio Mobile, your mobile device becomes the radio.
cmd.fm - Command-line radio for geeks
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Audirvana Plus - Build for sound quality