GNU Wget is a free utility for non-interactive download of files from the Web. It supports HTTP, HTTPS, and FTP protocols, as well as retrieval through HTTP proxies.

Download an entire site
wget -m -p -k robots=off http://www.somesite.foo.com

This will commmand will do the stuff, and -m and -p will grab all images, CSS, etc. robots=off ignores a sites robots.txt file If you add the -k flag, wget will convert all absolute links into relative links.

Donwload a part of a site
wget -m -k -np http://www.somesite.foo.com/images

The -np (no parent) options means that wget won’t travel “above” /images in the hierarchy

Check here for additional versions
Backup copy here  (1.10.2 //090102)