Wget
From MohidWiki
Wget is a little utility that gets files by http via the command line
Examples
This example gets all files within an anonymous ftp folder.
> wget ftp://ocdist6.sci.gsfc.nasa.gov/requested_files/*.*
This example gets an rss feed from a php request and stores into a file.
> wget -O wikichangesrss.xml --user=wikiguest --password=wikiguest http://www.mohid.com/wiki/index.php?title=Special:Recentchanges\&feed=rss