The Southern Poverty Law Center is giving away free Y'all Means All stickers. I love an offer that's both free and grammatically correct!
After filling out the form, you have to click through twice in order to submit your request! You should get a confirmation screen that says “YOUR STICKER WILL BE THERE SOON!”
I'm not 100% certain these are still sending out, but the signup form worked for me just now and they definitly sent me one when I previously posted this last October.