Skybrud.Umbraco.GridData is a small package with a strongly typed model for the new grid in Umbraco 7.2 and above.
The package makes it easy to use the model in your MVC views, master pages or even in your custom logic - eg. to index the grid data in Examine for better searches.
The package is available on NuGet as well. This is the recommended approach to installing the package.
You can find a bit of documentation for this package on GitHub.