Fabio, IIS, Varnish, Kong, Squid, lighttpd, emacs (probably).

Actually Emacs as a dev proxy like Charles Proxy could be handy... ;)

Also there exists an http module for emacs: https://www.emacswiki.org/emacs/HttpServer

> > > And yet we have only a handful

> > Apache, nginx, haproxy, envoy, traefik, and probably dozens more that aren't on the top of my head.

> You literally listed a handful ;)

How many solutions to a problem are needed when the problem is well-defined before there is no longer a need to grab for more?

There are probably thousands on Github for the use of teeth-cutting like in the blogpost. I've made one. You just lose interest when you impl the easy/naive stuff and need to actually use a real solution in production.