Mac OS X only: Freeware application iTunesVolume is an attractive iTunes controller for your Mac desktop. Like many before it, iTunesVolume offers playback control and displays album artwork (and it looks great doing it), but iTunesVolume sets itself apart with a very simple always-on-top control: a volume slider. Through this simple slider, you can access and control everything else the app does, which is virtually everything you can do in iTunes. iTunesVolume takes a little time to wrap your head around, but once you do, it offers a really nice way to interact with your music. iTunesVolume is freeware, Mac OS X only.