This FatSecret Python library aims to facilitate data visualization accessed from the API. It includes categorized methods such as foods, recipes, recipe types, saved meals, exercises, profile management, food diary, exercise diary, and weight diary.
BlindSquare founder, Ilkka Pirttimaa, once browsed over Wikipedia's Augmented Reality article and realized the concept focused solely on vision. Pirttimma believed the concept could expand to audio; thus, the idea for BlindSquare was born. The BlindSquare app provides "a new solution that combines the latest technology to help the daily life of the blind." BlindSquare pulls data from the FourSquare API and alerts users of restaurants, stores, and other locations surrounding them via audio instructions.
It's always exciting to see those outside the web industry using an API to improve their sites. NY Times First Look blog has a great example of what Dallas Public Library has done with the Best Sellers API.