A C# Application, using MahApps.Metro for visual flair.
Use Github for Windows or Git Bash to clone the project and push/pull commits.
If you're using Github for Windows, you can open the project by right clicking on it and selecting "Open in Explorer".
The project should ideally be opened in Visual Studio 2012, which you can obtain from Microsoft Dreamspark by signing up for an account and downloading the software. Use Solution Explorer on the right-hand side to open individual files for editing.
Please see MahApps.Metro to use metro style controls in the application.