HTTrack Website Copier
- Customizeable web site mirroring tool for Windows and Linux/BSD. [GNU GPL]
- http://www.httrack.com/

SiteUpload
- A small .NET command-line utility that uploads whole directories to a FTP server. Smart enough to upload only changed files.
- http://www.jelovic.com/siteupload

Teleport Pro
- Professional website download tool including a GUI and graphical feedback of download progress. Can also understand websites with complex dynamic HTML and Javascript, and be used for offline browsing.
- http://www.tenmax.com/teleport/pro/home.htm

WebGet
- Downloads files specified in a URL list, which can be in plain text or GetRight format. Designed to be used together with WebSuck (available from the same site) which can extract URLs from web pages.
- http://www.ake.nu/software/webget/

GNU wget
- GNU mirroring tool which supports http, ftp, proxies, authentication and recursive retrieval of web pages while in the background.
- http://wget.sunsite.dk/

W3mir
- An all purpose http copying and mirroring tool.
- http://langfeldt.net/w3mir/

Rsync
- Secure remote file transfer.
- http://samba.anu.edu.au/rsync/

Rdist
- A program to maintain identical copies of files over multiple hosts.
- http://www.magnicomp.com/rdist/rdist.shtml

WebLech URL Spider
- A web site download tool in Java, which supports many features required to download websites and emulate standard web-browser behaviour.
- http://weblech.sourceforge.net/

Sitecopy
- For copying locally stored web sites to remote web servers.
- http://www.lyra.org/sitecopy/