This article gives an in-depth description of Small Demons, "a web-based literary database that visually indexes, annotates, and connects the people, places, and things in books we read and love to the world beyond their pages."
Beyond that are many great ideas for how schools and libraries can use this site with the world of young adult literature.
Connects books to people, places, movies, music and things. Many nice features in the works and opportunities to contribute and curate are forthcoming.