
UK Benefits - my experience of how best to navigate the benefits/discounts available if you become disabled.
Click here.

PolyBlocks - a
polyomino enumerator written in 1987 when I was 14 or 15 years old.
Click here to open in an online BBC Basic Emulator.
It's very slow in this online emulator, but you can run it much faster in a modern BBC Basic Emulator, like the one from
RT Russell.
You can also download the
source code for a modern superfast version.
This has successfully verified the number of free Polyominoes from order 3 up to 18 - which is contained in
OEIS:A000105.
Or you can run a
fast version in your browser. It's not as fast as running it locally, but it will work.