Although I can't say I've seen 'Fewest Turns' option, there are similar Navigation options available on Sat-Navs. As a general rule Sat-Navs try to plan a route that goes up in road size and then descends again in road size near the destination, I quite often select 'Avoid Motorways' unless I am travelling hundreds of miles, because I find Sat-Navs seem to go out of there way to get to a motorway only to leave it one or two junctions later, when it's not worth the bother. The kind of Navigational options I have seen include :-
Avoid Unpaved roads / Tracks
Avoid Changing roads
Minimize Turns
Although some of these are more common on Smartphone Navigation Apps.
There is quite a selection of Voice activated Sat--Navs available, including :-
Garmin Nuvi 2597
TomTom Via 135
TomTom Go 510