

Nextcloud uses GNU AGPLv3 and explicitly doesn’t use a CLA: https://github.com/nextcloud/server/blob/master/contribute/HowToApplyALicense.md. They do this to prevent themselves from relicensing it. So they can’t suddenly take the code and make it closed source.
Regarding OpenOffice. I used to be a big fan of OpenOffice more than a decade ago, but LibreOffice has become my open source office suite since then.
Apache OpenOffice (AOO) might still work, but there is no significant development (see commits of the last year https://github.com/apache/openoffice/graphs/contributors?from=2025-05-01&to=2026-04-02&type=c). Only one person is committing on a daily/weekly basis, but this person is in their own words not a developer (https://github.com/apache/openoffice/pull/202#issuecomment-2561915795). Most of the commits are ‘cleanup’ commits where whitespace or comments are changed https://github.com/apache/openoffice/commits/trunk/.
LibreOffice on the other hand is actively developed. Others who are actually involved explained this better than I can:


I’m a big fan of https://beszel.dev/. Easy to set up server monitoring and notification tool.