Apple's marking the App Store's fifth birthday this Friday with free app giveaways, including the photo editor Over (regularly $1.99 USD).

Apple kicked off its anniversary celebration today with this message in the App Store: 

"From the 500 apps available at launch in 2008 to the more than 900,000 at your fingertips today, it's been a remarkably prolific five years for the App Store. To celebrate, we're giving everyone five landmark games and five groundbreaking apps for a limited time."

You can start downloading these free apps now here.