HOWTO rotate large numbers of images in Ubuntu

I needed a way for my wife to rotate a whole bunch of JPEG images.  It had to be simple to use (i.e. GUI not command line).

I stumbled across a blog that suggested the nautilus-image-converter plugin, which worked perfectly. It has a simple right-click interface that allows you to rotate images in place or use a renaming scheme. It can also do resizing.

Brilliant.