GetJam is a free coupon extension for online shopping. GetJam finds discounts and promo codes and applies them at checkout, so there is no need to look for ways to save money.
ProLightweight (size less than 2 mb), no browser lagging
ProEasy to use interface
ProAvailable in 17 countries and five languages
ProHas a powerful coupon and products search
ProNo registration required
ProIt is free
ConNot much shops