I don't think there are any.

Because servers would serve different content based on user agent virtually all browsers start with Mozilla/5.0...

curl, wget, lynx, and elinks all don't by default (I checked). Mainstream web browsers likely all do, and will forever.

	▲	userbinator 6 days ago \| parent [-]
		Anubis will let curl through, while blocking any non-mainstream browser which will likely say "Mozilla" in its UA just for best compatibility and call that a "bot"? WTF.