Have you looked at FreeCiv? It doesn't have such a thing, but it's basically Civ II (or Civ I if you load the other ruleset) with automation that's actually useful. You can set build queues, and production goals for cities ("optimise for maximum production but at least 2 spare food"). You can put settlers and engineers on 'automatic' or 'build railway from here to X'. It saves a lot of micromanagement.