Using Craft CMS to manage content within an app
Several people are using Craft to power apps.

Here's a good hangout: Craft Powered Apps, with Aaron Berkowitz discussing how PBS Kids uses Craft to power multiple apps, by making the data in Craft available to the apps available via a JSON API. I believe they use Cordova, which runs independently of Craft but grabs all the data for the app via the API.

Aaron also discusses how publishing content via Craft helps them get around some app-update requirements.