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If you're looking for Microsoft-caliber applications for free, OpenOffice has alternatives to Word, PowerPoint, Excel, Access, and more. OpenOffice has come a long way after racing to improve its compatibility with Microsoft Office.

Pros Free: The most significant feature of OpenOffice is that it's free -- no subscription fee, no lump sum, no upsell to a pro version. If your business needs don't include complex word-processing or database-management features, then OpenOffice is a bargain.