SoundHound You're listening to the radio and you hear "You ain't nothing but a hound dog" blaring. And you're wondering, "What's that song called?" SoundHound will tell you that it's "Hound Dog," by Elvis. Go figure. But if you didn't have your app handy, there's no need to wait for the song to come back on the radio. Hum it and SoundHound will recognize it for you (assuming you're not tone deaf). The lyrics will show up, too. And all this time, you thought it was "pound dog!" Once you've got your paws on it, bookmark the song and listen to it later. Or Tweet it to your friends. Use SoundHound to identify the "hottest" songs these days. It turns out Elvis is old news. SoundHound recommends you download "One More Night," by Maroon 5...if you can bear to hear Adam Levine croon one more time. The free app is compatible with iPhone, iPod Touch, and iPad, but requires iOS 5.0 or later. It is available on Google's ( GOOG) Android as well.