It’s all free
I write programs about things that interest me and that’s all there is to it really.
This can be anything – cryptography, board games, genetics…
The software is available in the Microsoft Store and you can find the documentation in the Projects menu.
I generally write in C# as this provides a good balance of performance and development speed. I’m open to suggestions for improvements.
Check back occasionally as there will be new projects. Impossible to say what!