TrackIf - Alerts you if the price of your favorite products drop
PriceCute - Keep up with your competition's pricing on Amazon
Coupofy - Coupofy is USAs number 1 trustworthy deals and coupons website.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
LoveSales - Find and save products you love, get alerted when they go on sale.
Pricy - Amazon price watch