Get a free Redbox movie rental code: If you send a text message to 727272 with the text MOVIENIGHT, you will get a code for a free 1-day movie rental. You can use the code online or at a kiosk, and it will be good for a week. My Redbox message did not specify any restrictions on DVD versus Blu-ray rentals, so if you want Blu-ray, it is worth seeing if the code will work.
You can also get a B1G1 movie rental code when you text DEAL to 727272.
The expiration date for these offers is unknown.