Microsoft offers documentation on Windows 8 app design
Microsoft is offering preliminary documentation for developers on building various types of applications for the recently released Windows 8 Consumer Preview. The documentation focuses on key app scenarios to get developers started.
The end-to-end design documentation goes over three types of apps that Windows 8 developers will find themselves working on. The first guide deals with creating great entertainment apps for Windows 8. The second documentation deals with creating a game app that utilizes Metro UI and simultaneously improves its user experience. The final documentation goes over how to build news apps for Windows 8. Check out the documentation here.Further reading: Microsoft, Windows 8