Microsoft Office is costly so open source has some options for those who need basic functionality. OpenOffice was three result of Sun buying a german developers product which was cheaper then Office licensing. Sun immediately moved to open source the software and develop a community around it to maintain it.
- OpenOffice is the original, now handled by the Apache Foundation
- LibreOffice is a 2010 fork of OpenOffice
Open source is free which makes them common with Linux desktop users. Estimates vary but at least 100 million users of OpenOffice and LibreOffice are out there.
Cloud offerings for the free tier are limited but serviceable. Microsoft is very capable for basic works such as word processing and spreadsheets. Google has competed with Microsoft in cloud services with bot offering subscriptions for more services.