The Amazon Appstore celebrates its first birthday today.

Within the 12-month span, the Kindle Fire launched and helped the store grow from 4,000 apps to more than 31,000.

To celebrate, Amazon released a list of its most popular apps.

Most fall under the gaming, entertainment, and productivity categories.

Best of all, many of these apps are free.

If you don't already own these apps, there's nothing to lose to try them.

#10 Hangman Free

With the rise of word-associated games like Words With Friends and Scrabble, it seems people still prefer to stick the classic elementary school game of Hangman. You can play against a robot or challenge a friend to guess the word before the poor stick figure bites the dust.

Download: Hangman Free

#9 Jewels

Jewels is a classic puzzle game that requires players to swap gems around to match 3 and earn as many points as possible. As the jewels disappear, more will fall from above to fill up the screen, making it possible to create chains of jewel popping to earn multiplied points.

Download: Jewels

#8 Roller Lite

Skee-ball is arguably one of the best games you could find in an arcade growing up. It's the simple tap and slide functionality that makes Roller Lite fun and addictive. You can also switch the designs of each skee-ball and its set to match your personality. Too bad you won't be getting tickets to exchange for candy at the end of the night though.

Download: Roller Lite

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See Also:

• 8 Great Android Apps You've Been Missing Out On Lately
• Why Instagram Will Be HUGE When It Comes To Android
• Forget Photoshop, iPhoto Is The Only Photo Editor You Need On The iPad