I have been trying out this application and its awesome. Griffith is open source meaning it’s come free of charge. It helps you manage all your movie collection plus movies you have seen but don’t have any physical copies off. So next time you are trying to remember if you have seen a particular title all you have to do is just open it up and see if you have seen it. It even helps you keep track of movies you have rented out, want to see in future and will also retrieve posters and information about your movies online, from a wide selection of sources.
To try it out you can get it here it runs on all major OS’s.