OpenOffice or Microsoft Office. Use either. It’s like OS X vs. Linux… whatever tool that is best for the job right?

Here’s how you can make the two play a little nicer…

OpenOffice

• Already reads and writes .docx, .xlsx, and .pptx (admittedly the .pptx support isn’t near as developed as the previous two formats mentioned, from my experiences at least)
• Download and install the following: Excel Viewer, Word Viewer, and PowerPoint Viewer 2007
• Download and install the following: Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats

Users with older versions of Microsoft Office Products, including Word 2000/2002/2003, Excel 2000/2002/2003, PowerPoint 2000/2002/2003)

• Make sure your office products are updated with the latest service packs if any are available (check Microsoft Update)
• Download and install the following: Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats
• Download and install the following: Sun ODF Plugin for Microsoft Office

Users of Microsoft Office 2007

• Download and install the following: Sun ODF Plugin for Microsoft Office