#1 is Rotala rotundifolia. #2 I'm not sure about from the photo, it could be a narrow leaf Ludwigia (like L. brevipes) or it could also be Rotala, but a better pic would help. #3 is Hygrophila corymbosa.
Here is a list of plants I have bought recently.
Limnophila sp Guinea 'Broad Leaf'
Ludwigia repens X arcuata
Pogostemon stellatus 'narrow leaf'
Alternanthera Reneicki sp.