Excellent port of wget, which is a powerful Unix utility that can do batch FTP and HTTP downloads, perform load tests on servers, and any number of other clever things. This port works well under Mac OS X 10.5, as advertised; the only real issue is it does not work under earlier versions of Mac OS X, and the posting clearly states this.

wget is a command-line tool, so -- you'll need how to use it in the command line. Type (after installation) man wget to get the manual, or wget -h to get abbreviated help.