TrueLocal is one of if not the biggest and well regarded online business directories for Australia. The pages of TrueLocal do sometimes show up in Google search results and the detail to which you can complete your business profile with the free listing type is very good.
If you only do one free business directory listing other than Google Local then this would be the one to choose.
Adding a business listing is done from truelocal.com.au/submit-business/signup.do
TrueLocal.com.au, Add a listing
Enter new listing profile information
Add business details
Business contact details
Select business category
Now the profile has been created so you can login to it and add more detail if you want.