Savelist - Found products you want but not ready to buy?
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
DontPayFull - Verified coupons and discounts for a variety of online retailers.
LoveSales - Find and save products you love, get alerted when they go on sale.
Dealspotr - Dealspotr is like Wikipedia for deals.