I've posted previously (twice!) about DC area spring plant sales. I love these sales because you can pick up a ton of high quality plants while supporting our public gardens and horticultural institutions.
Chionodoxa, Glory of the Snow, is a fall-planted bulb that comes up as early spring flowers. I planted a bunch of them in the "hellstrip" between the sidewalk and the street in front of my house. It's an impossible spot to adequately care for due to high foot traffic, but for now it gleams with petite blue flowers.