The Criterion Collection is a company that licenses "important classic and contemporary films" and releases them in beautifully designed cases. (See a few of the greats here.) This usually means it's a collection of international, independent, out-of-print, rare, artistic, and otherwise creatively significant movies, but I think they've overlooked a few.
Here are some of my favorite films, which I've updated with brand-new Criterion Collection art. Here's to hoping they get an official release someday.