Well for one, the Powershell script I just wrote to build all the 3rd-party library dependencies for a video game.

tar.exe was added to Windows this January, sourced from libarchive: https://learn.microsoft.com/en-us/virtualization/community/t...

Unlike the GNU tar I'm used to, it's actually a "full fat" command line archiving tool, compressing & decompressing zip, xz, bz2 on the command-line - really handy :-O

FreeBSD's archive tools are built on top of libarchive IIRC. Not sure about the other BSDs.

I don't know, way outside my domain. Possibly none I guess?