Question: what are the best ecard sites?
Answer: Smilebox. Smilebox is clean, easy to navigate, and perfect for incorporating family photos.
Just Wink. Just Wink offers simple, modern ecards with lots of class and none of the fuss.
Some Ecards. Tons of (hilarious) options to choose from.
Paperless Post. ... 
Punchbowl. ... 
Katie's Cards.