Example Apps that uses Windows 8 in-app purchase system in the Windows Store

Question

Are there any apps in Windows Store that uses in-app purchase system?

If yes, which ones are that?

Answer 1

Wordastic and Word Recon are two games I've seen with live In-App purchases.

At present, Wacky Wordsearch seems to have made it to the store with simulated IAPs, if you want to see that process.