You definently have some Americanas. I am 100% sure that the 1st, 2nd 4th, 12th ,13th, and the 18th pic are all Americanas. And I am 50% sure that the black ones are Black Australorps.
4th down is EE, maybe male, 2 one down looks like welsummer, or speckled sussex, 3 one down looks like a new hampshire, 7&8 look like australorp,5&6 look like barred rock or coocoo maran. cuties.