@command{flock} from GNU.
@item @url{https://go.dev/, Go}
-Obviously, if you are planning to build Go-related software.
+At least for building supplementary utilities. And, obviously, if you
+build Go-related software. Actually Go-written utilities can be replaced
+and no Go dependency will be required at all.
@item FreeBSD's @command{fetch}, or @url{https://www.gnu.org/software/wget/, GNU Wget}, or @url{https://curl.se/, cURL}
Although @command{meta4ra} can be used instead all of them.