There is a racket port; I do not know how complete it is, though a quick look at the open issues suggests not all the pieces are there yet: https://github.com/bennn/mechanics

The most recent version of `scmutils` I see is from 2016: https://groups.csail.mit.edu/mac/users/gjs/6946/linux-instal... and https://groups.csail.mit.edu/mac/users/gjs/6946/scmutils-tar...

Edit: There seems to be quite a few ports to various languages: https://github.com/search?q=scmutils No idea how many are fully featured/tested.