My first SharePoint 2013 App is available since some days in the marketplace.
You can download it here:
Corporate News App
This App is a pure SharePoint App (not auto or provider hosted).
I decided to distribute this App as an open source project, so you can download source code on the codeplex project site :
This App is dedicated to the management of corporate news in SharePoint lists and the render as a classical dynamic carousel app part.
If you like it, please rate this tool on the marketplace pages !