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.
Savelist - Found products you want but not ready to buy?
Shoptimate - Use the Shoptimate extensions to compare the price without any click. When you browse an item on a online store, a bar shows up at the top to tell you if the exact same item can be found cheaper elsewhere. Including shipping costs
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
WishMindr - WishMindr is a free online service that allows users to create gift wishlists for birthdays...