Zowasel - Save time and money
LoveSales - Find and save products you love, get alerted when they go on sale.
CollectOffers - Coupon Codes, Discounts and Deals
TrackIf - Alerts you if the price of your favorite products drop
Groupon - Each day Groupon offers a deal through local vendors in your city.
Giftwhale - Giftwhale allows you to create personalised wish lists online.