RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
ebates - Find thousands of coupons, promo codes and discounts.
Dealspotr - Dealspotr is like Wikipedia for deals.
link-o-mat - Cashback Portal - Verdiene mit linkomat Cashback - weltweit über 9500 Shops
Shoop - Interactive ticketing and social networking platform. Book social encounters, not just tickets.