Endeca is a tool that allows for Faceted Browsing. An example of it can be found on the Barnes and Noble site, where it powers the BookBrowser feature.

In a recent interview, Peter Morville said the following about faceted browsing and Endeca:

The user experience will begin with a keyword search, but we’ll have all sorts of new facets and filters for refining our query. I may want to Google my possessions or the contents of my house or your bookshelf. Last week I went to the shopping mall for the first (and last) time this year. It was a horrible experience. I had to physically drag my body from store to store in search of a specific product. I desperately wanted to Google the Mall. And thanks to RFID, it may not be too long before that’s possible. Of course, Endeca may be a better choice than Google, since their Guided Navigation approach fits perfectly with an increasingly faceted future.

The Libraries at North Carolina State University added Endeca into their library catalog in January 2006. Details