Nice to see it _not_ being based on LibreOffice since I'm really not a huge fan of it, mostly due to the (clunky) interface and poor responsiveness. Never used OnlyOffice but it looks much more lightweight, so hopefully it'll be better
I wonder if this is kosher:
https://github.com/Euro-Office/core/commit/e452acebeb3433895...
On the one hand, the authors of AGPL certainly didn't intend the "Additional Terms" to be a means to restrict forking. On the other hand, Ascensio System SIA apparently wants to restrict forking, and flouting this is asking for legal trouble (especially since Euro-Office appears to be a major thing).
https://en.wikipedia.org/wiki/Euro-Office
A tech preview is available at https://github.com/Euro-Office
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It has been alleged that the company behind OnlyOffice is selling a modified version (P7/R7 Office) is Russia. These allegations aren't completely meritless.
For example, a commit to a third-party (?) P7-Office-plugin repo is titled "Replace OnlyOffice with R7-Office and fix encoding (UTF-8 no BOM)" (emphasis mine). (https://github.com/r7-consult/plugin-grammalecte/commit/ca45...)
The R7-Office FreeBSD port contains files named "onlyoffice-docxf.xml" and "onlyoffice-oform.xml". (https://www.freshports.org/editors/linux-r7-office/)
A GhostBSD package contains files that contain Ascensio System SIA copyright notices. (https://pkg.ghostbsd.org/stable/FreeBSD:14:amd64/latest/All/... --- Zstandard-compressed tarball)