LibreOffice is for free download available Desktop Windows 10 Windows 8/8.1 Windows 7 MacOS, and Linux No subscription and pay. This LibreOffice you can save as .odt, .odp, .ods, and .odg file format OpenDocument. It works for Microsoft Word, Microsoft Excel, and Microsoft PowerPoint.

Are you keep old Office 2003, 2007 or 2010? It no longer for tech support pay, fix, or security update. Use for LibreOffice for free. It for Technical support, software update, security update, update fix or future.

Collabora Office is for free download for personal available Mobile Android and iOS No subscription and pay. This Collabora Office you can save as .odt, .odp, .ods, and .odg file format OpenDocument. It works for Microsoft Word, Microsoft Excel, and Microsoft PowerPoint. Microsoft Office mobile to subscription and pay to edit. It works with Chromebook is available Google Play.

Microsoft 365 is for download subscription and pay month or year. This Microsoft you can save as Word, Excel, PowerPoint and OneNote. It works for OpenDocument Format, OpenDocument Presentation, OpenDocument Spreadsheet, and OpenDocument Graphics. Microsoft it so old office format. Microsoft Office it so too old for years. There are future update new version. If you don't want subscription, you can cancel subscription.