What does HackerNews think of DesktopEditors?
An office suite that combines text, spreadsheet and presentation editors allowing to create, view and edit local documents
https://github.com/ONLYOFFICE/DesktopEditors
The headless server is Apache, the client and visual elements AGPL, which might be the confusion.
I personally find it a bit easier to use with better docx support.
OnlyOffice is an open source office suite that has native support for Microsoft Office formats (.docx, .xlsx, .pptx). There is a desktop version that works offline and an online version that integrates with Nextcloud. There are also mobile apps (closed source).
Home page: https://www.onlyoffice.com
Download: https://www.onlyoffice.com/download-desktop.aspx
GitHub: https://github.com/ONLYOFFICE/DesktopEditors
WPS Office (previously known as Kingsoft Office) is a closed source office suite that works on Linux. The software is quite popular in China, and the Android app has over 100 million downloads on the Play Store.
Homepage: https://www.wps.com/office/linux
Download: http://wps-community.org/downloads
Flatpak: https://flathub.org/apps/details/com.wps.Office
FreeOffice is another closed source office suite for Linux.
Homepage: https://www.freeoffice.com/en
Download: https://www.freeoffice.com/en/download/applications