I've use the attached one from an old EPE magazine for years. It's simple and reasonably robust against being accidentally applied to powered circuits (not mains!), and has a <0.3V test voltage. Two ranges - 1R (adjustable) and 1M.
It's wheatstone bridge based, done well, with a very good circuit evolution description.
This is pretty much exactly how I designed my version

just didn't add the safety features such as diodes and resistors on the op amp / comparator inputs.
also I don't need 2 ranges, just detecting resistances below the given threshold should be sufficient (for my particular design 500\$\Omega\$ is good enough, but if I want 1\$\Omega\$, it's just a simple math on the resistor values). the only difference is that my probes are between ground and one of the resistors, instead of VCC and the other resistor, which I don't think should make a difference

anyways, I think I'll go ahead with my design since it doesn't seem to have any major issues.
When the microcontroller costs $0.57 (qty 1) perhaps it isn't overkill? Welcome to the new world!
I know you can throw a micro controller at pretty much anything these days and call it quits, but it's a really bad practice that makes you lazy and prevents creativity / problem solving skills. all in all, it's bad engineering
