These have been built in my free time to learn something new, or try my hand at something novel.
I used to jam a lot at in-person jams in Toronto, but I've enjoyed a few longer form remote jams in recent years as well.
These are probably outdated by the time you read this, but I rarely build tools for other people anyways. Mostly experimental.
Outdated, difficult to play and probably broken.
My son has been playing around with Godot and game jamming when he gets the urge! these are his creations.