I suspect the two are tilapia too but yeah still too young.. =/The cichlids look like Tilapia, as to what species, they all look the same at that size to me, so impossible to say until they grow up a bit.
Don't know the other at all.
You mean grow all three? There's another hiding behind the powerhead.. not sure what fish that is but the head seems interesting.. Unfortunately, it's hard to take pics of it..grow them up a little I cant tell could be a nice extra.
I think you're right.. I google'd pics of swamp darter and the images do look similar to the one in my tank..I could be wrong, but the second one looks a lot like a swamp darter to me.