ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
Microsoft 365 - Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online
Apache OpenOffice - Apache OpenOffice is an open source, office document productivity suite.
SoftMaker FreeOffice - SoftMaker Office is an office suite for Windows, Linux, Android, Windows Mobile, and Windows CE.
Polaris Office - Polaris Office is the most compatible all-in-one office suite that lets you create and edit documents for free.