For browsers that do not support HTML5, you can use Modernizr. Modernizr is an open-source
JavaScript library that can detect whether a browser supports HTML5 features, and enable them
if it does not. In the ASP.NET Web Forms Application template, Modernizr is installed as a NuGet
package.

The Visual Studio 2013 project templates use Bootstrap, a layout and theming framework
created by Twitter. Bootstrap uses CSS3 to provide responsive design, which means layouts can
dynamically adapt to different browser window sizes. You can also use Bootstrap's theming
feature to easily effect a change in the application's look and feel. By default, the ASP.NET Web
Application template in Visual Studio 2013 includes Bootstrap as a NuGet package.

The ASP.NET Web Forms Application template includes a set of NuGet packages. These
packages provide componentized functionality in the form of open source libraries and tools.
There is a wide variety of packages to help you create and test your applications. Visual Studio
makes it easy to add, remove, and update NuGet packages. Developers can create and add
packages to NuGet as well.When you install a package, NuGet copies files to your solution and automatically makes
whatever changes are needed, such as adding references and changing you’re the configuration
associated with your Web application. If you decide to remove the library, NuGet removes files
and reverses whatever changes it made in your project so that no clutter is left. NuGet is
available from the Tools menu in Visual Studio.

JQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event
handling, animating, and Ajax interactions for rapid web development. The jQuery JavaScript
library is included in the ASP.NET Web Forms Application template as a NuGet package

Built-in validator controls have been configured to use unobtrusive JavaScript for client-side
validation logic. This significantly reduces the amount of JavaScript rendered inline in the page
markup and reduces the overall page size. Unobtrusive validation is added globally to the
ASP.NET Web Forms Application template based on the setting in the <appSettings> element of
the Web.config file at the root of the application.