Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
WishSimply - Wishsimply is a easy-to-use online and mobile service to manage and share your wish lists.
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.
WishMindr - WishMindr is a free online service that allows users to create gift wishlists for birthdays...
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
PriceGrabber - Get the lowest prices on computers, electronics, furniture, cameras, clothes and more.