The New Zealand Travelpass is a great transport option for the independent traveller. It consists of a number of preset itineraries that are based on the most popular travel routes.
The Travelpass is good for travel on InterCity coaches and Great Sights day tours as well the Interislander ferry. It also includes extras like scenic cruises on Milford Sound and tours to Cape Reinga.
All Travelpass travel sectors can be broken into smaller journeys, hopping on and off at any stop en route, however backtracking is not allowed.
Travelpasses are available in the following routes:
Auckland-Paihia (via Whangarei) | awesome NZ Cape Reinga day tour | Paihia-Auckland (via Whangarei | Auckland-Rotorua (via Waitomo) | Rotorua-Wellington (via Taupo) | Wellington-Picton on Interislander ferry | Picton-Christchurch (via Blenheim and Kaikoura) | Christchurch-Dunedin | Dunedin-Queenstown | Queenstown-Milford Sound (including Red Boats cruis on Milford Sound) | Milford Sound-Queenstown | Queenstown-Franz Josef (via Wanaka and Fox Glacier) | Franz Josef-Picton (via Punakaiki, Westport and Nelson) | Picton-Wellington on Interislander ferry | Wellington-Napier (via Palmerston North) | Napier-Auckland (via Taupo).

Auckland-Rotorua (via Waitomo) | Rotorua-Wellington (via Taupo) | Wellington-Picton on Interislander ferry | Picton-Christchurch (via Blenheim and Kaikoura) | Christchurch-Dunedin | Dunedin-Queenstown | Queenstown-Milford Sound (including Red Boats cruise on Milford Sound) | Milford Sound-Queenstown | Queenstown-Christchurch (via Oamarama and Tekapo)

Auckland-Rotorua (via Waitomo) | Rotorua-Napier (via Taupo) | Napier-Wellington (via Palmerston North) | Wellington-Picton on Interislander ferry | Picton-Greymouth (via Nelson, Westport and Punakaiki) | Greymouth-Fox Glacier (via Franz Josef) | Fox Glacier-Queenstown (via Wanaka) | Queenstown-Milford Sound (including Red Boats cruis on Milford Sound) | Milford Sound-Queenstown | Queenstown-Christchurch (via Oamarama and Tekapo)

Auckland-Paihia (via Whangarei) | Paihia-Auckland (via Whangarei)

Auckland-Paihia (via Whangarei) | awesomeNZ Cape Reinga day tour | Paihia-Auckland (via Whangarei)

Rotorua-Gisborne (via Whakatane and Opotiki) | Gisborne-Napier | Napier-Rotorua (via Taupo)

Auckland-Rotorua (via Waitomo) | Rotorua-Napier (via Taupo) | Napier-Wellington (via Palmerston North)
Available in reverse

Auckland-Rotorua (via Waitomo) | Rotorua-Napier (via Taupo) | Napier-Wellington (via Palmerston North) | Wellington-Auckland (via Taupo and Hamilton)
Available in reverse

Rotorua-Taupo | Taupo-Rotorua

Auckland-Rotorua (via Waitomo Caves) | Rotorua-Taupo | Taupo-Tauranga | Tauranga-Auckland

Picton-Nelson | Nelson-Greymouth (via Westport and Punakaiki) | Greymouth-Fox Glacier (via Franz Josef) | Fox Glacier-Queenstown (via Wanaka)
Available in reverse

Nelson-Greymouth (via Westport and Punakaiki) | Greymouth-Fox Glacier (via Franz Josef) | Fox Glacier-Queenstown (via Wanaka)
Available in reverse

Greymouth-Fox Glacier (via Franz Josef) | Fox Glacier-Queenstown (via Wanaka)
Available in reverse

Christchurch-Dunedin | Dunedin-Queenstown | Queenstown-Milford Sound (includes Milford Sound cruise) | Milford Sound-Queenstown
Available in reverse

Christchurch-Queenstown (via Tekapo and Omarama) | Queenstown-Milford Sound (includes Milford Sound cruise) | Milford Sound-Queenstown
Available in reverse, departs Queenstown

Christchurch-Queenstown (via Aoraki/Mount Cook, Tekapo and Omarama) | Queenstown-Milford Sound (includes Milford Sound cruise) | Milford Sound-Queenstown
Available in reverse, departs Queenstown

Greymouth-Fox Glacier (via Franz Josef) | Fox Glacier-Queenstown (via Wanaka) | Queenstown-Christchurch (via Omarama and Tekapo)
Available in reverse

Christchurch-Queenstown (via Aoraki/Mount Cook) | Queenstown-Milford Sound (includes Milford Sound Cruise) | Milford Sound-Queenstown | Queenstown-Franz Josef (via Wanaka and Fox Glacier) | Franz Josef-Nelson (via Punakaiki and Westport) | Nelson-Christchurch (via Blenheim and Kaikoura)
Available in reverse

Christchurch-Queenstown (via Tekapo and Omarama), Queenstown-Milford Sound (includes Milford Sound cruise) | Milford Sound-Queenstown | Queenstown-Franz Josef (via Wanaka and Fox Glacier) | Franz Josef-Nelson (via Punakaiki and Westport) | Nelson-Christchurch (via Blenheim and Kaikoura)

Kaikoura-Christchurch | Christchurch-Kaikoura
