From the Free Software Foundation’s Wget home page:
GNU Wget is a free software package for retrieving files using HTTP, HTTPS and FTP, the most widely-used Internet protocols. It is a non-interactive commandline tool, so it may easily be called from scripts, cron jobs, terminals without X-Windows support, etc. GNU Wget has many features to make retrieving large files or mirroring entire web or FTP sites easy…
This software is released under the GNU General Public License (version 3), and I have bundled it into a Mac OS X installer package. Please note that I am not the author, and thus cannot provide much more than rudimentary technical support, except in the matters of installation—but please feel free to contact me with any problems that you might have.
Click here to download my latest installer, for Wget 1.11.4, which now includes a shell script (in /usr/share/wget) to optionally uninstall the program should you decide to do so at any point.
Click here to download my previous installer, for Wget 1.11.2. Click here to download an even older installer, for Wget 1.10.2, which is compatible with Mac OS X Tiger.