Dunkin': Free doughnut all day with any purchase of a beverage.
Krispy Kreme: Free doughnut all day, no purchase necessary. As an added bonus, the chain is trying to give away 1 million doughnuts, and if they do, they promise another giveaway in the future.
WalMart: Not to be outdone, WalMart is giving away 1.2 million free glazed doughnuts across 4,000 stores.
Tim Hortons: U.S. stores are introducing a Churro Donut at select locations, and will offer the limited-edition flavor nationwide starting June 12.
LaMar’s Donuts: Get a free doughnut on Friday, and a free cup of coffee if you plunk down for a dozen doughnuts.
Cumberland Farms: Get a free doughnut at select locations between 5 and 10 a.m. on Friday with the purchase of a "dispensed beverage" such as coffee or fountain drinks.
Bite Squad: Free delivery with the code DONUTDAY
Coupons.com: The app has a $3 rebate offer (in the form of an in-app coupon) for purchasing doughnuts at Target, Walmart, Kroger, Ralphs, and other grocery stores on Friday.
Salvation Army: The National Doughnut Day originators are giving away free doughnuts at various events; check local listings.