HotelTonight Escape - The best getaway deals for tonight (or the weekend)
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Suiteness - Find and book hotel suites online
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
Gopher - Better hotel deals automatically, every time + cash back
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.