LibreOffice is a free office suite that is compatible with other major office suites, and is available on all operating systems. It is an independently-developed version of the OpenOffice.org suite.
LibreOffice is open-source, and is therefore free to download, use and distribute.
No language barriers – it's available in a large number of languages, with more being added continually:
http://www.libreoffice.org/international-sites/