The name of the organisation that maintains the codebase for the identically named OfficeSuite.
Some features:
OpenOffice.org is included on TheOpenCD, which is an easy way for windows users to try this great OpenSource software without having to commit to a large change.
By default, OpenOffice includes support for English (US), and unfortunately none of the add-on language installers supports English (New Zealand). So, here is one way to manually get support for it. The following instructions will change the configuration globally, and may require administrator privileges.
1. OpenOffice uses "myspell" dictionaries. Download the dictionary .zip file for en_NZ from their ftp site. (This is based on the en_GB (Great Britain) dictionary but updated with NZ placenames, etc). It is about 220kB in size.
2. Unzip this .zip file into an appropriate directory. On a Debian Unstable machine, OpenOffice looks for dictionaries in /usr/lib/openoffice/share/dict/ooo, but that is a symlink to /usr/share/myspell/dicts.
cd /usr/lib/openoffice/share/dict/ooo && unzip /path/to/en_NZ.zip
This should give you files named "en_NZ.aff" and "en_NZ.dic". On windows, it will be whereever you installed it to, most likely something like C:\Program Files\OpenOffice.org1.1.2\share\dict\ooo.
3. In the dictionaries directory above, edit the file "dictionary.lst" and add a line that says
DICT en NZ en_NZ
Now, the next time you start OpenOffice, you should be able to set the language to English (New Zealand) and see a little dictionary icon next to it. If you are using the OpenOffice quick start or something that keeps it in memory, you will need to completely close down OpenOffice first.
4. To get the thesaurus and hyphenation working as well, you can use the files provided by other variants of English. Eg if you have support for en_US thesaurus (install the "openoffice.org-thesaurus-en-us" package in Debian, or download it) and the en_GB hyphenation support ("openoffice.org-hyphenation-en-gb" in Debian, or download it)
to the "dictionary.lst" file as above.
More verbose instructions for manually installing dictionaries under linux are available here.