OpenOffice is an easy to use, free, open source, full-featured office suite that's compatible with Microsoft Office, Word Perfect, Lotus and other office applications.
This project is being developed for more than twenty years and it's designed from the start as a single piece of software. As any open development project, anyone can report bugs, request new features, or enhance the software. That's why OpenOffice.org 3 does everything you want your office software to do, the way you want it to.
This office suite is ideal for word processing, spreadsheets, presentations, graphics, databases and more. It runs fine on Windows 2000/XP/Vista or Linux/UNIX under Wine. It is available in many languages and stores all your data in an international open standard format. OpenOffice can be used to read or write most common office software packages.
If you need portable OpenOffice then download "OpenOfficePortable_3.1.1_English.paf.exe". Run the "exe" file and install it into a folder. Please notice that if your installation path has unicode characters you may have some problems.
Enjoy!