Not a real picture of Apple CEO Tim Cook. AP / Matthew Sumner for Getty Images There's one technology that excites Apple CEO Tim Cook more than others: augmented reality, or software that lets you see virtual objects in the real world, either through a smartphone's camera or one day through a pair of smart glasses.

"I am so excited about it, I just want to yell out and scream," Apple CEO Tim Cook said to Bloomberg about augmented reality.

Apple opened the door for more augmented-reality apps earlier this month when it released ARKit, new software that makes it easier for developers to make AR apps.

"We’re building it into iOS 11, opening it to ­developers—and unleashing the creativity of millions of people," Cook said. "Even we can’t predict what’s going to come out."

Developers are going nuts with ARKit. But it's still in beta, so most people can't download the apps yet. But MadeWithARKit, a Twitter account, newsletter, and blog maintained by Sam Dauntesq, is collecting all the highlights as they appear — and employees from leading AR firms like Apple, Snap, and Magic Leap are following it too.

Here are some of the highlights: