Spacewolff - P2P marketplace for ads. Turn excess space into ad space.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Wrapify - Connecting drivers + brands to create on-vehicle advertising
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
Grabb-It - Location-based ads on your Uber's window
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.