BeEF is a penetration testing tool that focuses on the web browser and facilities various client side attacks.
The Web Cloner extension allows you to take a pixel for pixel clone, as far as is possible2), of a site and host it yourself. Cloned pages are modified on the fly to automatically hook any user that visits the page as well as intercept any
form field POST requests.
The post 'BeEF web cloning, BeEF mass mailing, Social Engineering with better BeEF!' has a more detailed intro to the Web Cloner and a getting started using