I wanted to download all graphic files from our organisation's graphics repository web page.  They are Illustrator (.ai) format and Corel Draw (.cdr) format.They are directly hyperlinked (i.e. <a href=http://server/path-to-file.ai>...</a>.
Filter hyperlinks from web page and download all that match a certain pattern
grep;wget;curl;download;filter
wget includes features to support this directly:wget -r -A *.ai,*.cdr 'address-of-page-with-hyperlinks'-r enables recursive mode so it will download more than simply the given URL, and -A limits the files it will download and keep in the end.