Forget about clipping coupons and go paperless. Coupon Sherpa (www.couponsherpa.com), a new iPhone app, allows shoppers to access in-store coupons for more than 100 retailers on an iPhone or iPod Touch. Available for $1.99, the Coupon Sherpa app offers discounts for more than 100 participating retailers including Bloomingdales, GNC, JCPenney, Kmart, Office Depot, TGI Friday’s, and Walgreens.