Pandora® internet radio This app is amazing. I've come across more new music via this app than any other source and even though the commercials are annoying I can live with knowing that in a matter of seconds, the sweet, free, music will once again return.

SoundHound This app has helped me to identify many songs that I would have normally been extremely frustrated over not knowing the name.

SiriusXM Internet Radio So many stations it's hard to settle on just one.

Slacker This app is great because you can customize stations with over 100 different genres to choose from.