Reading through the info on the main page is concerning. It sounds like AI slop, or someone writing in that style. No developer writes like that about their project.

If it actually does all the things it says, great. Let me know.

Follow up: this is the calculator I use on Linux. I didn’t realize it had Windows builds available.

https://qalculate.github.io/

cudatext as a notepad replacement. It’s closer to a full featured text editor, but is very quick to startup with no extensions installed.

I have no idea about replacing paint, but irfanview for simple viewing, cropping, resizing, swapping formats, etc.

For calculator stuff I sometimes just open the Python REPL. If you know the language (even a little bit) it does all the things and more. Every time I try to use the Windows calculator it annoys me trying to find the right button and them accidently putting another operator instead of equal or vice versa.