I think all the modern arrangers have Markers, as described above. I know Korg, Roland and Yamaha do. I don't remember whether Ketron does, but I think so.
I like the way Roland displays the chords from midi files. Korg has a nice view where you can pick the part for which you want the score to display.
I experimented last week with some CDG files on the Korg. Actually works great if you wanted to do K*****e. Sounds amazing!