RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
LoveSales - Find and save products you love, get alerted when they go on sale.
ebates - Find thousands of coupons, promo codes and discounts.
TrackIf - Alerts you if the price of your favorite products drop
link-o-mat - Cashback Portal - Verdiene mit linkomat Cashback - weltweit über 9500 Shops
Giftwhale - Giftwhale allows you to create personalised wish lists online.