Free and Online Marketing Platforms:

FreeBusinessDirectory.nz 
New Zealand's Free Business Directory. 100% NZ owned. You can add an unlimited number of Free Business Listings on FreeBusinessDirectory.nz

MotorCars.nz 
Website to find and advertise Cars for Sale in New Zealand.

RealEstate4Sale.nz
New Zealand's Property Site. Find Real Estate for Sale in New Zealand, Real Estate Agents and Properties for Sale.

Commercial4Sale.nz
Commercial Real Estate for Sale.

RealEstate4Rent.nz
Properties and Houses for Rent.

Farms4Sale.nz
Lifestyle and Farm Properties for Sale.

Luxury4Sale.nz
Luxury Properties for Sale and Real Estate Agents / Salespeople.

WeddingDirectory.nz
If you have a wedding service business, such as wedding cakes, wedding dresses, this can be a great place to list your business.

TourNewZealand.nz
An adventure and Tourism website, listing businesses that cater for the tourism industry and hospitality services.

Whats-On.nz
A great place to find things to do, activities, events and what's on in your local area. Businesses can advertise for a fee and not-for-profit organisations can list for free.

BuyersGuide.nz 
NZ's Official Grocery and Retail Supplier Platform - Product and Brand Presentation Platform.

FoodGuide.nz
Guide to New Zealand Restaurants and Cafes and Hospitality. 

WineGuide.nz
Wineries and Winery Guide.

UniBooks.nz
New Zealand Platform for Buying and Selling Books online.

Gardener.co.nz
Auction Classifieds, Guide to Gardening and Gardening Community. 

EZYSale.nz
New Zealand Free Classifieds Site.

FarmAnimals.nz
Livestock Auction Classifieds for Farmers.

MerchantDirect.nz
New Zealand Direct-to-Trade Wholesale Platform.

There are more platforms listed on BerrymanMedia.nz to help with online advertising, along with product/brand promotion and Free SEO.