Andrew Osmond provides an entertaining and illuminating guide to the endlessly diverse styles, cultures, and visions of the genre, with entires on 100 of the most interesting and important animated films from around the world, from the 1920s to the present day.
Source: http://shop.bfi.org.uk/books/100-animated-feature-films-book.html#.Wgyw3GhSzIU
Honorable Mention: In February, 1914 at the Palace Theatre in Chicago, Illinois, cartoonist Winsor McCay (1869-1934) premiered "Gertie the Dinosaur", (containing 10,000 drawings with backgrounds), in an interactive cartoon where he (in person) seemed to step into his animated cartoon by walking behind the screen at the right time and showing up as part of the animation. Many consider this the first 'successful' animated cartoon (others being considered just novelty acts).
In November, 1914, "Gertie the Dinosaur" was released to theaters around the country, being the first animated film viewed by movie goers at the time.
Stage/Literature-to-Film
World-famous animators pick the best animated movies, including Disney and Pixar movies, cult movies, anime and more
Timeout's list of 100 greatest animated movies. Available at: http://timeout.com/newyork/film/the-100-best-animated-movies'
Movies and shows adapted from books, short stories, folklore, and fables. See my Retellings list for looser adaptations (think Clueless for Emma).
Some personal favorites of Animated Movies of all kinds
1001 Movies You Must See Before You Die
by sp1tiVIP OG 13