/u/StopReadinMyUsername on reddit combined the average ratings (Critic's & Users) from IMDb, Rotten Tomatoes, Metacritic and Letterboxd, and then weighted and tweaked the results with general film data from iCheckMovies and IMDb to reveal the 1001 Greatest Movies of All Time.
The 2013 edition can be found at http://trakt.tv/user/sp1ti/lists/they-shoot-pictures-dont-they-1000-greatest-films-2013.
Welcome to 2012's edition of the 1,000 Greatest Films. This will be the last update prior to the publication of the 'earth-shattering' Sight & Sound poll which will be unfurled later in the year. The Sight & Sound results will no doubt have a major impact on TSPDT's 1,000 Greatest Films listing. It will become the most heavily weighted poll within our calculations. Anyway, that is then, and this is now."
The 2013 version of TSPDT’s 1,000 Greatest Films is finally here. After months of stop-start, data-building and unhealthy calculation antics, the latest group of 1,000 movie offerings has been assembled once again for your pleasure (or displeasure). Depending on your observation skills, you may have already noticed that there is a new presentation for this ongoing project.
The old 2012 edition can be found @http://trakt.tv/users/sp1ti/lists/they-shoot-pictures-dont-they-1000-greatest-films-2012