Widgets are reusable user interface components such as navigation menus, breadcrumbs, and image carousels.
Multiple widgets may be used within a single Web page design, and individual widgets will often recur on a single Web page.
Widgets are typically made up of multiple HTML elements. Typographic and control styles cascade through to widgets; therefore all widgets are dependent upon a typographic style sheet, and in some cases they require separate styling for forms, buttons and input fields also.
View the demos here.