Only three I know are:

Colchicum also called autumn crocus.

Lycoris, called naked lily, spider lily, or resurrection lily. L. squamigera, is a tender bulb in USDA zone 6 but it can be dug in the fall and treated exactly as a glad bulb in colder zones.

Crocus speciosus is a hardy fall blooming blue crocus.

Leucojum autumnale is really pretty, IMO. Grows about 6-10", has grassy leaves and little bell-shaped flowers. Forms a clump. Is at high risk of being defoliated by gardeners thinking they've found a patch of grass...

And outdoor Cyclamen are great, too. Particularly under deciduous trees. The colony expands over time, as do the tubers, and the number of flowers increases year on year.