The guys at BlackSmithGames have announced that their AppventCalendar will be returning for 2011. If you go to AppventCalendar.com everyday in December, you will be able to pick up a free game, and a free app. Thats 2 free downloads a day!
Something new for 2011 -- an iPhone app, meaning that you don't even have to visit the website to download your gift. You can check the app, and download the free gift, directly on your iPhone.
Don't forget, like any advent calendar, if you miss a day you can't go back and get it later!