Three new controls have been added:

1. HTMLEditor - The HTMLEditor control allows you to easily create and edit HTML content. You can edit in design mode, as a rich text editor, or in source view to edit the HTML markup directly.
2. ComboBox - The ComboBox control provides a DropDownList of items, combined with TextBox. Different modes determine the interplay between the text entry and the list of items.
3. ColorPicker - The ColorPicker Control Extender can be attached to any ASP.NET TextBox control. It provides client-side color-picking functionality with UI in a popup control.

Download from here.