This is now included in all new versions of Pro Tools.
From the webpage:
“If you’re looking to get a taste of what the world of Structure™, the future of professional sampling, has to offer, Structure™ Free offers a great introduction without paying a price — literally (it’s free!). Developed by the acclaimed Digidesign® Advanced Instrument Research (A.I.R.) group, Structure Free is a free sample player for Pro Tools® that provides some of the key features of its big brother, Structure, allowing you to quickly and easily integrate a wide range of sounds into your Pro Tools sessions and tweak them to make them your own.”
This is a no brainer.