The first is Cessna 404 Titan, ZK-NDY, registered to Ashburton Air Services. The second is an Air Chathams General Dynamics 440/580 Convair, registration ZK-CIF.
The last is an Airwork Boeing 737-219C, ZK-NQC. This aircraft has a fair amount of history in New Zealand, first arriving in 1982 registered to Air New Zealand [and without the hush-kit on the engines!]. In 2001 it was re-registered to Airwork Flight Operations, where it remains. I'm not sure how many cycles or hours it has, but it is rumoured to be one of the highest-time B737's in the world - not surprising considering it has at least 28 years of service. This aircraft is used for both passenger charters, as well as regular night-time freight runs [as can be seen by the Courier Post titles on the tail].