One line of description, many many more lines of code!
"Multiple independent, movable racks"
Euro-only so far, but working a treat. Clicking and dragging either a rack's border or an empty part of the rack will allow you to move it around. Modules are currently confined to the racks they sit in (no dragging between racks), but this is on the to-do list.
The picture below represents a Doepfer 9U LC9 case, a Doepfer 6U LC6, a Doepfer 32hp 'Beauty Case' and a 3U 168hp 'skiff'.