I hatched these out about 3 weeks ago. Out of the 9, I have ID'd the silkie cross and 3 Easter Egger crosses. Other possible moms are australorp, black copper marans, Wyandotte, Brahma, barred rock. I think that is it. Silkie cross on right.. maybe a marans cross on left? Wondering if this might be a purebred Brahma? If so, it's a male with the feathering right? He is also in the picture below, with an almost white chest. This is another one I am unsure of the mom, in the center. I have two that look almost identical, have more of a redder head, legs are a bit darker, and they are more petite than the others. Here are the two black ones. I think the only with the heavier leg feathering on right is a marans cross. He/she came out of a darker egg. They all still have almost non-existent combs.
You might have to wait until they mature more. The whiter thick legged one could be a rooster. As far as what mixes they are, it's easier to guess when they get more adult feathers.
Both the Australorp and the Marans crosses will have white skin, the Marans cross chicks will have heavier feathering on the legs. Female chicks out of the Barred Rock will look similar, but will have yellow skin. You can only have a 'pure' Brahma if both the rooster and the hen are the same variety/color. They Wyandotte mixes will have cushion combs.