RhoQuantum the world's best quantum computer simulator
So the project is currently still under active development, but John has finished revision 1 of the prototype! The project is hosted on gitlab, RhoQuantum.
It looks like this at the moment: 
Basically there are 19 'Qubits' arranged in a hexagon in the centre-right of the board, they each have 1 (incredibly bright) LED, which we are using to represent the quantum state of the qubit.
The code to model quantum side of the project is written in very simple C at
the moment, it's based on the rather more complex C++ code that we used in the
first version of this project that ran on a Raspberry Pi,
(PiQuantum)[https://gitlab.com/piquantum/PiQuantum]
I'll add some more info and maybe a demo when I fix all the bugs. There are many.
PiQuantum - The original
I don't think we ever wrote about our (mine and John's) work on PiQuantum, which I think is a shame, so here you go I will mention and link to it.
I had to put the KICAD render of PiQuantum here because it looks cool! 
I actually don't think we have any finished pictures of PiQuantum, it's now
residing at the University of Bristol (somewhere).