Coupons.com - Coupons & Coupon Codes, Savings & Deals
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
DontPayFull - Verified coupons and discounts for a variety of online retailers.
Groupon - Each day Groupon offers a deal through local vendors in your city.