MillerColumns

What is it => http://en.wikipedia.org/wiki/Miller_columns

Demo => http://miller.mageekbox.net/

FancyTree is implementing it, see here => http://www.wwwendt.de/tech/fancytree/demo/#sample-ext-columnview.html

This is what i suggest to add

Another demo adapted to touch devices : http://pebbleroad.github.io/taxonomy-browser/build/