The CodeShow() on CodePlex is one source which may help you a great deal in programming for the Windows 8 Platform. You may get a comprehensive picture of an end-to-end app but more importantly CodeShow() gives you an opportunity to learn all the bits and pieces of accessing devices like camera, error handling with grace etc.
In order to install CodeShow() there are some options. You can install from Windows Store from here:
http://aka.ms/codeshowapp
This not some kind of an executable but bundled source code.
Another option is to get the source code from here
http://codeshow.codeplex.com/.
Once here, you can download a zip file by hitting the marked tab (Download). This will give you a snapshot of the source code as it exists at the time you downloaded. Mark you, it gets continuously updated and if you are not vigilant you may miss out. This is a zip file and extract everything to your favorite folder.
There is yet another option Clone it or Fork it.
If you are going to fork it then it means you are going to contribute to its development.
If you clone it you will be getting the latest version to work on and you can do this from Visual Studio 2013 (should be at least Update2). You will use the Team explorer tab in the Solution Explorer.
The details of getting to work with the clone are available at the CodePlex site.
