Stay away from the "designer" stuff. Large tile companies like Dal and American Olean make non slip versions of some of their product lines. Also don't go with to large a tile. Grout lines add to the safety of these tiled areas. A laundry should be about function. Pick a nice basic tile that is safe.

Small mosaic tiles! No bigger than 2"x2", Your feet will grip it because of the grout lines.

Like a shower floor, mosaics are the old timers rule for non-slip.

non-slip ceramic tile

Thanks for all your suggestions. I'm looking into my options and am glad to have these things to consider. :-)