If you use one of many Adobe products, then you may have used one of the standard sets of colour swatches, such as Pantone or Trumatch, that Adobe provides in the ColorBook format. A spotlight search for "acb" will show what swatches you have installed.
By converting these to the OS X standard format for color swatches using this simple utility, you can use the color swatches that you own in any app installed on your Mac, so for example you could select a Pantone color from your company logo as part of a Keynote presentation, or Pages document.
The data contained in the swatches is licensed to you by Adobe. It is illegal to redistribute them. This application allows you to convert swatches that you have licensed for your own personal use.