[201984]

There's also a windows port of busybox if you want something more stable. w64devkit uses it.

https://github.com/rmyorston/busybox-w32

[NetMageSCW]

Not similar at all - too heavy weight when you just want to use a small tool.

[d3Xt3r]

How the heck is a portable 637KB .exe that doesn't require any installation, extraction or admin rights to run, "too heavy weight"?

[chasil]

This one might interest you, although it's quite old.

https://unxutils.sourceforge.net/

Busybox's shell is ash, but the above set includes an old zsh IIRC.

Note also that the Frippery Windows busybox is available as a 64-bit version, in case 2gb is not enough (easy with some big awk associative arrays).