Chrome: If you bounce between a lot of different music services then chances are you've got a tab open in Chrome to one of them all day long. Unity Music Media Keys is a Chrome extension that makes that experience better by offering quick push button controls and support for Apple's keyboard media keys.
What's especially nice about Unity Music Media Keys is that it works on a bunch of different music webapps, including Pandora, Grooveshark, Rdio and more. You can either pull up the controls directly in Chrome, or simply use the media keys. If you bounce around between a lot of different music services for your music, Unity Music Media Keys is handy to have around.