LibreOffice Review
LibreOffice is a free and open-source document suite that's available on all major OSes, but it still doesn't offer online access or collaboration features. It's also not nearly as smooth in operation as competitors.
Libreoffice Calc Corel Wordperfect Corel Wordperfect Office Softmaker Office Textmaker Microsoft Office Wordperfect Office
Source: pcmag.com