Disney Movie Program -Even if you don’t buy Disney Movies, you can still join the club to earn free merchandise. You can often find free codes to use. I got a Cars watch without ever buying a single Disney movie.
Pampers Rewards - Here’s another reward program where you don’t have to buy Pampers items to earn free things, including Shutterfly gift certificates & magazines. There are free codes at least 1-2 times a month.
Kellogg's - If you aren't currently signed up for Kellogg's Rewards, I'd encourage you to do it now. I think I've gotten at least 2 free Shutterfly Books, 2 - $20 certificates to Shutterfly, & numerous free magnets. I rarely buy Kellogg's products, but there are often free codes on blogs or Kellogg's Rewards Facebook page.
Coke Rewards - We don't think much pop at our house but you can find free codes on line. You can also ask people to save their lids for you. Occasionally they run promotions to get free things without any codes.
You can always goggle any of these for free codes