So far, I've noticed house sparrows (a whole herd of them, and they all flock to the feeder at the same time)
Black Capped Chickadees
Dark Eyed Junco
Cardinals (just the usual pair)
Blue Jays
Tufted Titmice

I know I'm missing some. The starlings hung around in the summer but are elsewhere now. One day I looked out to see a small hawk perched on my porch railing, eyeing the feeder as if it were an all-you-can-eat buffet. Luckily, the wee entrees aren't that stupid.