Curly Head Shampoos? (20Characters)?

Alrighty. My hair used to be very Straight when I was a little kid. I have always had thick hair, and it always gets tangely. Now, my hair is very thick and curly. I don't know why, I don't curl it, I straighten it, and it won't even straighten it all the way, because of the thickness (and my straightener is not that great) But, what is a good conditioner that is for curly hair, that tames the curliness, not straightens it, but keeps it curly and just maintains the frizzyness