SkinTune is accessed like a filter, and once invoked it presents you with a straightfoward interface (pictured) for improving your subject's skin. The plugin's product page claims the dev's spent years studying skin color and analyzing samples from around the world, which yielded their somewhat unique approach to solving the skin tone conundrum: you select your subject's skin as a reference, and are then able to apply presets that are based on and arranged by nationalities. Each library, such as African, Asian and European, contains between 50K-80K tweakable colors based on each race's unique characteristics. You're then able to use some custom tools - which they claim are twice as accurate at Photoshop's - to adjust elements like hue and saturation.

So for all those out there who are stricken with the skin tone blues, give the SkinTune demo a whirl to see just how much of a time-saver this plugin can be.