Cadaver Save
For the Unix command line, released under the GPL. Mailing list and archive, source and binary downloads.
http://www.webdav.org/cadaver/   

Sitecopy Save
Sitecopy will keep a remote site synchronized with a local copy using a single command. Free software for Linux, Microsoft Windows, Unix (various). [Source]
http://www.lyra.org/sitecopy/   

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