Starbucks has an “app of the week” every week, whereby you can pick up a code at your local Starbucks for a free download. This week they’re offering a free download of FlightTrack Pro, which usually costs $9.99 to download.
So if you’re interested just go to your local Starbucks this week and pick up a FlightTrack Pro download card. Unfortunately they’re only available in the US and valid for Apple mobile devices and not Androids.
(Tip of the hat to Eric)