Angry Robot, a leading publisher in "modern adult science fiction, fantasy and everything inbetween" is running Open Door submissions until April 30th. If you're unagented with a completed classic fantasy book, this is the spot for you.
Strange Chemistry, the YA imprint of Angry Robot, is also jumping on the bandwagon and allowing submissions. They're searching for anything in the realm of Sci-fi or Fantasy. So, if you're unagented with a YA sci-fi or fantasy novel, check them out here.