A quote by my mathematical hero John von Neumann

Anyone who attempts to generate random numbers by deterministic means is, of course, living in a state of sin.

Fat Tuesday is coming up and I got that out of the way: xllrandom.
It is an update using the latest xll8 library that is a faithful reflection of the latest C++ standard. It won’t win any UX prizes, but it makes it possible to play with that in Excel.
If you can’t be bothered to download and compile the code, use this.