Hybrid recommender algorithm which enhances a content-based approach exploiting collaborative data.
Matlab implementation
More details about the theory behind the algorithm in my master dissertation:
Slideshare http://www.slideshare.net/AlessandroLiparoti/content-based-recommendations-enhanced-with-collaborative-information
Full thesis https://www.politesi.polimi.it/bitstream/10589/120993/3/2015_04_Liparoti.pdf