There are currently 5 Redbox codes for FREE Movies that are reported as working great. You will have to still use your credit/debit card in order to get the movie, but you will not be charged so long as you bring the movie back the next day. If you don't, you'll be charged $1 a day.
Find a local Redbox here
- DVDATWAG (Good at Walgreens Redbox locations ONLY)