[asolove]

Also very curious about this. I’ve been slowly building one myself and would happily give up if another good one already exists. Tried searching the web and can’t find it.

[morphle]

There was a CDClabs github version and the Frank/STEPS code. Contact me, its burried in my 20 TB archive.

[cxr]

CDG Labs. But this is not it: <https://github.com/cdglabs/sketchpad14>