Here's a few that I have found:
Digital Stamp Oasis - cute bunnies, I've made a card from one...check my
blog...
CC Designs has a few cute ones,
here's another card I made using their Think Spring line
Pink Petticoat had some cute chick images
Dustin Pike has some FREE images,
here's a card using ONE of a few he's given out
Two Scoops Rice has lots of cute images and you can also get their free monthly image by visiting their blog!
Hope this helps!