Add Image Grabber II, a program endorsed by both King and Fatman!

However, not sure it's completely free based on the sites I've Googled...

Reminds me, somewhat, of another thingy for Firefox called DownloadThemAll:

"DownThemAll is fast, reliable and easy-to-use! It lets you download all the links or images contained in a webpage and much more: you can refine your downloads by fully customizable criteria to get only what you really want!"

I use it heavily on MP3 blogs which may feature a dozen or so separate MP3 links. I can customize the filter to only get ".mp3" files, and, bingo, single-click downloading of concerts from rbally.