OpenOffice.org Portable

OpenOffice.org Portable (formerly Portable OpenOffice.org) is the complete OpenOffice.org office suite, including a word processor, spreadsheet, presentation tool, drawing package, and database - packaged as a portable app, so you can take all your documents and everything you need to work with them wherever you go.
This full-featured office suite is 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.