Jetstream 31 / 32 have an interconnect system. Only quote in maintenance manual is " To assist recovery from certain flight attitudes, the rudder and aileron cable control system are interconnected." Not much! However they spring system is lightly loaded (7lbs) so unless you get in on of those situations where the passengers have all either been flung into the baggage area at the back or have landed on the crews laps I would assume in normal flight with co-ordinated turns it would not be noticed.
More modern aircaft CRJs for example do not require the use of rudder in normal flight as the flight control system works all that turn stuff out. Might be done using elecronics but it is still a aileron / rudder interconnect system.