CodeCanyon - Viral Facebook Web App (Favorite Animal) v1.1 | 536 KB
Favorite Animal is a lightweight Viral Facebook Web App written in PHP , the user can chose from a variety of animals (can be added unlimited animals) and the script will automatically post a picture of the animal on the user's wall along with URL to your website and a small description, he can comment on his profile or other profiles and more, so start making some traffic/money now!
DEMO:
http://codecanyon.net/item/viral-facebook-web-app-favorite-animal/2815797?WT.ac=search_thumb&WT.seg_1=search_thumb&WT.z_author=Pricop