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