Cinema Paradisio, The Artist, Om Shanti Om, Luck By Chance, Khoya Khoya Chand, Inception (if you accept one interpretation), Harishchandrachi Factory, The Fall, Singin' In The Rain.
Wonder why are there so many films about films, filmmaking and the love of films. I don't think, at least proportionately, there are as many books about books.
Most of these films are quite good too.
I have just mentioned a few of my favorites, a longer (though not complete) list is here.
