Here was my opinions on first impression:

1) N. sanguinea
2) N. gracilis
3)N x ventrata
4)N. ampullaria, green
5) N. rafflesiana
6) N. alata, along the same lines as the one called N. alata "Boschiana"
7) N. x Judith Finn

I am fuzzy about three and six and can see them being a young ventricosa as Tony mentioned, and a N. x ventrata. I am pretty sure about the others, for whatever my opinion is valued, lol.