Pilatus (Turbo) Porters are quite popular, Cessna Caravans too.
At my former homefield they use a C206, with a turbine conversion, I think it carries the pilot plus six jumpers but cannot be sure.
In Eastern Europe I have seen An-2s, though these must be expensive to run with their rate of fuel burn, and Let L410s.
And I remember that at Ampuriabrava LEAP they use (among others) a twin Beech, a B200 perhaps. But then, that place claims to be Europe's busiest centre for skydiving.