LibreOffice (All languages) (Portable)

LibreOffice Portable is a full-featured office suite that's compatible with Microsoft Office, Word Perfect, Lotus and other office applications. 

It's easy-to-use and feature-rich, performing nearly all of the functions you'd expect in an office suite, but at no cost.

Installing LibreOffice Portable
To install LibreOffice Portable, just download the portable package at the top of the LibreOffice Portable page and then double-click it. Select the location you wish to unpack to and click OK. An LibreOfficePortable directory will be created there and all the necessary files installed. That's all there is to it..

http://portableapps.com/apps/office/libreoffice_portable
or
http://www.libreoffice.org/download/