This first one is Galanthus nivea, just the common single flowered form. We don't have too many of these, strangely as we have many more of the doubles, which we keep dividing and replanting.
The double one is much fancier, though not always appreciated for its delicate petals as you pretty much have to be lying on the ground looking up to see them well.
This on was obliged to turn over so you could see it better.
On of the select forms, this on Galanthus nivea 'Sam Arnott'. We have looked at several others to add to the collection, but at $25 a bulb for the fancy new ones, we aren't likely to be buying a lot of them any time soon.