Macbook Prices by Performance - Find the cost effective Macbook for your needs
LoveSales - Find and save products you love, get alerted when they go on sale.
Wish Whale - Simple slick and flexible online wish lists
TrackIf - Alerts you if the price of your favorite products drop
GiftBuster - Wish list registry & shopping list app
Giftwhale - Giftwhale allows you to create personalised wish lists online.