> There's also webOS, which was originally funded by Palm and doesn't seem to have any open source development any longer,
After a short stint at HP, webOS is now owned by LG, they use it as the OS for their Home Entertainment (TVs, projectors,...) and nowadays also as an Automotive OS platform.
It's very much alive, too - LG just sponsored a hackathon to develop games for the new webOS store (including a Flutter-specific stream) with some legitimately good prizes (I think first prize was $100k, second was $80k).
I have the option "show details" and there to choose "strictly necessary". (on mobile Safari and Desktop Edge, Desktop Firefox blocks the cookie screen automatically)
After a short stint at HP, webOS is now owned by LG, they use it as the OS for their Home Entertainment (TVs, projectors,...) and nowadays also as an Automotive OS platform.
Open Source: https://www.webosose.org/