WebCopy!

UnMHT adds MHT file reading/writing support to Firefox.MHT (MHTML, RFC2557) is the webpage archive format to store HTML and images, CSS into single file.

MetaProducts Offline Explorer is a Windows NT/2000/XP/2003/Vista program that allows you to download an unlimited number of your favorite Web and FTP sites for later offline viewing, editing or browsing.

Teleport Pro is an all-purpose tool for getting data from the Internet. Launch up to ten simultaneous retrieval threads, access password-protected sites, filter files by size and type, search for keywords, and much more. Capable of reading HTML5, CSS3, and DHTML. With server-side image map exploration, automatic dial-up connecting, Java applet support, variable exploration depths, project scheduling, and relinking abilities.

PageArchiver (previously called "Scrapbook for SingleFile") is a Chrome extension that helps you to archive web pages for offline reading.

grab-site is a crawler for archiving websites to WARC files. It includes a dashboard for monitoring multiple crawls, and supports changing URL ignore patterns during the crawl.

SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet. It does this by asynchronously copying the sites Web pages, images, backgrounds, movies, and other files to your local hard drive.

Darcy Ripper is a powerful pure Java multi-platform web crawlerwith great work load and speed capabilities. Darcy is a standalone multi-platform Graphical User Interface Application that can be used by simple users as well as programmers to download web related resources on the fly.

Wpull is a wget-compatible web downloader and crawler with WARC and Python/Lua scripting support

Fresh WebSuction is designed for downloading Web pages or web contents (reference material, software files, online books, e-zines, news articles) for viewing offline, and saving money on Internet connection fees. If you pay fees for the amount of time you are online you can save money by quickly downloading all the Web sites you want to view and disconnecting.

WebCopier is an easy-to-use website mirror utility. It allows to download entire Web sites, store them locally and view them later, at users' convenience. WebCopier provides access to the downloaded information at any time, no matter where its users are, no Internet connection is required. WebCopier can copy or print whole sites or sections. Your saved pages can be copied onto disks and CDs, so you can take your Web-snapshot with you. Companies can use WebCopier to transfer company's intranet contents to staff desktops and notebooks, create a copy of companies' online catalogs and brochures for sales personal, backup corporate web sites, print downloaded files. Individuals can use WebCopier to save complete copies of their favorite sites, magazines, or stock quotes. NewsCopier - RSS newsreader puts the latest headlines, weather, sports, business, and entertainment news right in your hands. »

WebZIP Offline Browser - a fast and easy way to download, store and browse Web sites offline.