Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Swatches - A fun and accurate color picker for the real world
Invisible Hand - InvisibleHand gets you the lowest price on shopping and flights.
ColorSnapper - The missing color picker for Mac.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Colordot for iOS - A color picker for humans.