good_plotty_fics
Weird name, but here's some fics that are basically novels. Not all of them are quite that long and some are unfinished, but they're all really good. The classification for this collection is fics with a developed stand alone plot, rather than like snippets into characters lives, that I particularly enjoyed reading. Fanfic writers are awesome writing full length novels and posting them online for free.
(Closed, Moderated)