[HTML pages] How to download a Web site?
HTTrack is an excellent downloader, free GNU GPL (free).
HTTrack allows you to download a website from the Internet to your hard drive, building recursively all directories, recovering html, images and files from the server to your computer. HTTrack arranges the structure of relative links. Simply open a page of the site in your browser, and you can freely browse inside, as if you were logged. HTTrack can also update an existing site, and resume interrupted download.
WinHTTrack is the Windows version of HTTrack (for 9x/NT/2K/XP) and WebHTTrack is the version for Linux/Unix/ BSD
