Number one is almost definitely ludwigia repens.
3/4 look like parrot feather to me.
The one that looks a little like some kind of sword...not sure what it is, but it looks like a weed that grows all over out here in Arizona that is not at all aquatic. Doubt it is the same thing though. I think it's just some sort of marginal or regular non-aquatic plant that got flooded out at the edge of the water there.