什么是免费/开源是CodePlex site上提供的内容.如CodePlex页面所述,它是一个可能对您有帮助的框架……

Telerik Extensions for ASP.NET MVC is
a lightweight framework which helps
you build rich user interfaces for
ASP.NET MVC while enjoying great
developer productivity.

Telerik在此处发布了其他信息以澄清问题.

http://www.telerik.com/purchase/faqs/aspnet-mvc.aspx
从他们的许可证FAQ页面：

How do you license Telerik Extensions
for ASP.NET MVC product? We offer two
licensing options for Telerik
Extensions for ASP.NET MVC.

Telerik Extensions for ASP.NET MVC
Open Source GPL (Open Source License)
This is a suitable option if you are
building an application for internal
use or an open source application with
a license compatible with the GNU GPL
v2.0.

Telerik Extensions for ASP.NET MVC
Commercial License (Developer License
with Subscription and Priority
Support) This is a suitable option if
you are building closed-source
commercial products for redistribution
or if you wish to avoid integrating
open-source components into your
application. This license is provided
per developer,so you need to purchase
the appropriate number of developer
seats from Telerik.

由于您正在开发内部应用程序,因此您似乎没问题.