NeoDownloader - As you know, there is a lot of websites with a lot of pictures, music and movies.
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Vov Picture Downloader - Download pictures from websites.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Bulk Image Downloader - With Bulk Image Downloader you can download full sized images from almost any web gallery.
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.