Let's only talk about ones that are still used in regular passenger operations (not cargo and no vintage planes like the DC-3).
I'll start the list off.
Boeing 727 (In service with Iran Air)
Boeing 737-200 (In service with First Air and Canadian North)
Boeing 747-200 (In service with Iran Air)
Boeing 747SP (In service with Iran Air and SyrianAir)
Airbus A300B2 (In service with Iran Air)
McDonnell Douglas DC-9 (In service with Delta

)
McDonnell Douglas DC-10 (In service with Biman Bangladesh)
EDIT:
Delta retired their DC-9's in January 2014 and Biman retired their DC-10's in February 2014. Looks like I haven't been reading the news lately

.