Since Oracle's purchase of OpenOffice you might be concernd over their commitment to continued development. Enter LibreOffice.
LibreOffice is a productivity suite that is compatible with other major office suites, and available on a variety of platforms. It is free software and therefore free to download, use and distribute.
BROffice, Google, Novell and Red Hat are among the sponsors of LibreOffice, a community led fork of OpenOffice that is to be developed under the umbrella of a European based non-profit to be named The Document Foundation.
Among those who have expressed support for LibreOffice and the Document Foundation are the Free Software Foundation, the OSI, OASIS, Canonical, credativ and Collabora and the GNOME Foundation.
One thing is certain, you don't need the expense of MS Office.
Added Sunday 14 November, 2010.