Global Caps Lock Key
globalcapslock.com
globalcapslock.com
But I don't really know, since I've been remapping Caps Lock to Control (Command on Mac) for the last ~20 years or so.
I was a kid, and yes I 100% installed this on as many machines I had access to. Grandparents, etc. Probably tried to do it at school too (can't remember).
Now I wonder about the likelihood it was really just malware with a novel method of distribution.
But, thankfully, the python code is short enough to feasibly review... Although I suppose another angle is to check if any of the dependencies are untrustworthy or typo-squatted.