I use HTTack to rip websites :) .Its fast and light.Most of ripers available are not free.But HTTrack is a free and open source website copier and offline browser by Xavier Roche licensed under the GNU General Public License. It allows you to download one, or a set of World Wide Web sites from the Internet to a local directory, building recursively all directories, getting HTML, images, and other files from the server to your computer. Its available for linux and windows. 

HTTrack uses a web crawler to download a website. Some parts of the website may not be downloaded by default due to the robots exclusion protocol. HTTrack can follow links that are generated with basic JavaScript and inside Applets or Flash, but not complex links (generated using functions or expressions) or server-side image maps.

site

Download (win)