FileProInfo - It's All About Files, Software, Online Tools - 100% Free
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
File-Extensions.org - Large computer file extension library with detailed explanation of each file type with links to download free or associated software programs.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
GroupDocs - GroupDocs is a web-based service for online document sharing, collaboration and management.
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.