Any legacy lenses that autofocus on m43?

I'm going down the route of adaptors and legacy lenses such as the OM 50mm or Minolta Rokkor 50mm etc and was wondering about autofocus.  My motivation is mainly budget and slightly for nostalgia.

On the whole I'm not too bothered about AF, but was just thinking ahead where I might find it useful to spend a bit more and have that option.  Do any older lenses match up nicely with m43 bodies to offer a "semi-manual" functionality?