Einstein
To install: go install robpike.io/cmd/einstein@latest.
This is a simple program to print an STL representation of the "einstein hat" tile described in An aperiodic monotile by David Smith, Joseph Samuel Myers, Craig S. Kaplan, and Chaim Goodman-Strauss.
The output is simple textual unoptimized STL. For the reflected tile, run with the -r flag.
The output is included in the repo, if you just want the result.
The Quad and Box code could be pulled out to create a library, but it's so small it's probably not worth it.