One of the best parts about the Amazon Appstore is its Free App of the Day program. Every day of the year, Amazon takes a popular app that regularly costs anywhere from $.99 to $5 and offers it for free to anybody with a Kindle Fire or Android device. Now Amazon is upping the ante for a special promotion today.

As part of its Free App of the Day program, Amazon has decided to make six apps completely free. These apps, called “Kindle Hits,” presumably represent what Amazon sees as the best performing Kindle apps of the past year.

Here are the free games included as part of the promotion:

All of the above apps are free for the remainder of today. If that’s not a good enough deal, Amazon will be sweetening it with the addition of 20 free Amazon Coins for each of the above apps that you download. These coins can be used in place of money on in-app purchases within any Amazon Appstore game.

Oh, and besides the above free apps, the Amazon Appstore is also offering Autodesk Sketchbook Mobile as part of its regular Free App of the Day promotion. Unlike the above apps, this isn’t a game, but rather an app similar to Adobe Illustrator. You can use your Android device to draw whatever you like and even import it to your PC through a convenient email feature.

[Image: Amazon Appstore]