OpenOffice.org is an open source productivity suite that serves as a replacement for Microsoft Office. It contains the same basic feature-set, but saves you hundreds of dollars since it is free. With that being said, OpenOffice.org does not include the grammar checking, macros, and a replacement for Microsoft Outlook. However, it does offer PDF output, Writer macros (Writer’s own macro and scripting feature), smaller file size documents than Microsoft Office, and simplicity. The suite includes Writer (replacement for Word), Calc (replacement for Excel), Impress (replacement for PowerPoint), Base (replacement for Access), Draw (replacement for Visio), and Math (replacement for Equation Editor).