Clovis Fritzen designed this Arduino-compatible, vertically-mountable board that exclusively uses through-hole components:
Vertically mounted Arduino for Breadboard
I personally love the concept of electronic boards connected in “slots” (vertically attached to a horizontal board), like most industrial-grade PLC’s or even our desktop’s expansion cards (video, sound memory): it saves a lot of space and adds more functions to the system, all at once!
The PCB is for sale on Tindie:
Vertically mountable Arduino – PCB only
This is an Arduno-Nano compatible controller that can be vertically mounted to bredboards and boards
OSH Park 