Australian English Dictionary

There is a great project creating an Australian Dictionary for use in Firefox, OpenOffice, Outlook Express and several other programs.

http://www.justlocal.com.au/clients/oooau/

There are multiple files offered on the site. I recommend the Kelvin files as they have a cut down version with the most common Australian spellings, without all the -ize words.

http://www.justlocal.com.au/clients/oooau/#The_Kelvin_version_of_the_dictionary_files

Plugin for Firefox

http://www.justlocal.com.au/clients/mozillaau/

Kelvin Version

http://www.justlocal.com.au/clients/mozillaau/kelvin_australian_english_dictionary-2.2.0-fx+zm+tb.xpi

You can also install this language file for all users by installing for one user and copying the audictionary@justlocal.com.au from the users profile into the Firefox extensions folder.