I'm tinkering with a couple homebrew ones like this, non magic, clock/steam based ones. one is a clockwork summoner type, the other is a clockwork wizard type, hundreds of gadgets known, some prepped daily, and can specialize in a "school" like holography (illusions), etc. currently still a work in progress, but for the summoner one, basically changed eidolon to automaton, and gave all his summoned creatures the clockwork template, being little wind-up toys that spring up to mimic whatever monster summoned