We've all been there, you're working on something and want to easily change a song in iTunes. What do you do? Well, you could right-click on the iTunes icon in the dock; but that will only give you rudimentary options. Well, here comes TotalTunes Control.
With TotalTunes, just create a toggle key then start playing a song. When you want to change a song, just press that key combo and you're given a slew of options for changing song, playlist, rating, volume level, shuffle, and repeat. You can download this slick application for free from the developer's website (it's freeware, but donations are accepted).