Yes, raspberry leaf tea is great!

It strengthens your uterus but like someone mentioned, only drink it up until O.
Green tea is supposed to be fine as long as you don't take it within a few hours of your prenatal because it will interfere with absorption of folic acid.
Lemon water is really good in general. It helps to keep your body alkaline (acidic foods turn alkaline in your body and vice versa) and is a good body tonic.