OpenOffice for Windows Alternatives

LibreOffice was developed to be a productivity suite that is compatible with other major office suites, and available on a variety of platforms.

Kingsoft Office Suite Free is a completely free office productivity suite, which includes three programs that reflect the different purposes and tasks required in any working/personal environment.

All new Microsoft Office 2016 Preview. Includes all new new versions of Word, Excel, and PowerPoint with redesigned Retina-optimized interface.

Calligra Suite is a set of applications written to help you to accomplish your work.