Now here's something I was never expecting. As part of the EA Daily Deals program this holiday season, Flight Control [Free] and Flight Control HD [Free] have had their prices slashed to zero dollars.
Flight Control is about as classic as games get for iOS. It not only has won a pile full of awards since it was released, it's single handedly responsible for popularizing the whole "line drawing" and "chaos management" family of games. Everyone needs to download it while it's free, which from the looks of it, is today only.