LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux, that gives you six feature-rich applications for all your document production and data processing needs: Writer, Calc, Impress, Draw, Math and Base. Support and documentation is free from our large, dedicated community of users, contributors and developers. You, too, can also get involved!
LibreOffice is a Split of of Open Office and is reported to follow the Free and Open Source (FOSS) beliefs more closely than Open Office does now... I have only tried LibreOffice out for a few minutes. LibreOffice, looks and feels like Open Office. So, I'm sure it will be easy to use. Once I get around to changing over...