Freeware Description :
    BackStreet is a multi-threaded website downloader and offline browser. By making multiple simultaneous server requests, it can quickly download an entire website (or part of a site) including HTML, graphics, Java Applets, sounds and other user definable file types, and save all the files in your hard drive The files can be archived in their native format, or as a compressed ZIP file. BackStreet Browser can rewrite all the links so that you can browse the site from your hard drive, without the need for an internet connection. Other features include URL and file filters, built-in browser display, site tree navigation, proxy support, site updates, site copy mode and more.

Freeware Description :
    HTTrack is an easy-use offline browser utility. It allows you to transfer a World Wide Web site from the Internet to a local directory, building recursively all structures, getting html, images, and other files from the server to your computer. Links are rebuilt relatively so that you can freely browse to the local site (works with any browser). You can mirror several sites together so that you can jump from one to another. You can, also, update an existing mirror site, or continue an interrupted transfer. The robot is fully configurable, with many options and features. The program is Open Source.