Open Office Extensions 1

Open Office Language Extensions:

Language Tool
English Names Dictionary en_US
English dictionaries for Apache OpenOffice
Numbertext
OO Pinyin Guide
US English Spell Checking Dictionary (smaller size)
中華民國臺灣正體中文標點符號工具列 (Republic Of China Taiwan Traditional Chinese Punctuation Toolbar)

Other Useful OpenOffice Extensions:
DMaths
CCMaths
Pagination
UI Languages / Language Pack

OpenOffice Variants/Clone/Alternative:
Apache OpenOffice, LibreOffice, IBM Lotus Symphony, oxygenoffice, Sun StarOffice, NeoOffice (Mac only)
https://wiki.openoffice.org/wiki/DerivedWorks