One 'oddball' in the UK was the PA46 piston Malibu which used to require a type rating. I believe this might no longer be the case and that it is now included within the SEP rating. Can anyone confirm?
PA46 type rating no longer required for piston which is now quite rightly regarded as just another SEP.
The turbine ones of course require an SET rating.
This still leaves the anomaly of the type rating required for the Extra400 but there ain't many of them around.