Ajax Control Toolkit For ASP.NET MVC | ASP.NET MVC Tutorial

What is the ASP.NET AJAX Control Toolkit?
The ASP.NET AJAX Control Toolkit is an open-source project built on top of the Microsoft ASP.NET AJAX framework. It is a joint effort between Microsoft and the ASP.NET AJAX community that provides a powerful infrastructure to write reusable, customizable and extensible ASP.NET AJAX extenders and controls, as well as a rich array of controls that can be used out of the box to create an interactive Web experience.

The AJAX Control Toolkit contains more than 30 controls that enable you to easily create rich, interactive web pages.

Is there any ASP.NET MVC AJAX Control Toolkit?
There is no such ASP.NET MVC AJAX Control Toolkit exists.

Does the existing ASP.NET AJAX Control Toolkit works with ASP.NET MVC?
There is no such ASP.NET MVC AJAX Control Toolkit exists amd the existing ASP.NET AJAX Control Toolkit will not work with ASP.NET MVC. You can give your MVC pages a code-behind and use the AJAX Control Toolkit as you would in regular ASP.NET, but that really violates the whole idea of MVC, so it is not advisable.

You can possibly get most of these AJAX controls from modern jQuery UI