The sweater pattern is Autumn Leaves Baby Cardigan by Nikki Van De Car. The dress fabric is from the "Love" line by Amy Butler. Those bits peeking out of the neck are cute little knotted ties on the shoulders of the dress. Sweetness.
And for Faith, a Northern sweetheart, similar sundress but with something warmer on top:
Fabric is also from the "Love" line by Amy Butler. This sweater is called Baby Roots Cardigan (Ravelry link). Below you can see the dresses on their own - I gave up on trying to put piping on the gathered waist seam on the purple dress. That nearly killed me the first time 'round. (This dress pattern is a free pdf, but I've misplaced the link right now. I'll post it after I do some digging).