Hi there! If you include the chicks' age and breed, it will really help us to determine gender. Also, I believe that this thread was made to help the thread starter document changes during growth according to gender in chicks, so he's mostly looking for good pictures of chicks at various ages whose gender is known. If you post these on a thread of your own, you will probably get better help than with posting here.
But, I would say that the chick all the way to the right in the second picture is a rooster.