Today’s promo on MacUpdate features Synergy 3.1.1b for US$4.50 (36% off, retail $7). Synergy places three buttons to control iTunes in your menubar: previous track, next track, and play/pause; as well as providing you with visual feedback about the currently playing tune. The Synergy controls, together with the ability to control iTunes via system-wide Hot Key combinations, mean that Synergy provides the fastest way of skipping between songs when using the keyboard or the mouse; all this without having to switch to iTunes or accessing its Dock menu.