collaborative filtering library in C++

Question

does any of you know any good specific library that contains implementations of common algorithms specifically geared towards collaborative filtering/recommendation system that is written in C++

so just like a machine learning library except that it's specifically geared towards collaborative filtering and/or recommendation system

Answer 1

Found some time ago on Google Code (I haven't used them yet):

http://code.google.com/p/recsys-nju/ http://code.google.com/p/recsyscode/

http://code.google.com/p/recsysexperiment/