Live Preview: https://apps.facebook.com/g-pfriends/
iFrame based application. Uses the PHP SDK v3.1.1. Supports OAuth 2.0. View History of Sent and Received Gifts. Easy-to-use admin panel for managing gifts. Powered by jQuery AJAX . Includes a like and send button. Very simple, clean layout. Runs smoothly in all major browsers. Publish feature is available when users want to share a gift they’ve received or found in the category. Free updates as long as it is supported. Easily monetized with banner advertisements.
Server w/ PHP v5.3+ MySQL Database
You should know HTML , JS and PHP for customization!