Re is a Recommendation Engine which uses advanced machine learning techniques to curate a tailor made list of things that users might like. Currently, Re recommend movies. However, service can be extended to a range of products such as clothing, electronics, TV shows and likes. Re is completely free as a service and open to collaboration.
WatchBuddy is a movie-recommendation system, based on your individual tastes.
iTunes for some reason only displays one $0.99 deal per week, this app will show you all the deals as they arrive.