Here is introducing another awesome app in the Windows Store. Drawboard PDF is exactly what it is, an app to allow you draw and annotate your existing PDF files, but not only that you can also create a completely empty white PDF page and fill it up with your drawing as you deemed fit.

We are having a hard time to recommend the app given the fact that you can already annotate your PDF files in the built-in Reader App from Microsoft in Windows 8. However, this app has one thing going for it, the Radial Menu analogous to that of OneNote. The built-in Reader app misses this extensive menu and pen feature. So if reading PDF all day your thing, or a student that collects PDF files for your theses, this is the app for you.

Here is the full description and screenshots of the App in the Store: