I don’t think the linux foundation founds any other kernel besides linux (they found plenty of other stuff ofc). And Linux is hardly the only (production ready and stable) kernel around.
There’s the BSD family, that has the most popular kernels besides Linux. I think there’s also a couple more use-case specialised ones like Illumos. And there’s some experimental kernels, like Hurd (I think there’s a Hurd/GNU Ubuntu or Debian official distro around) or RedoxOs
I don’t think the linux foundation founds any other kernel besides linux (they found plenty of other stuff ofc). And Linux is hardly the only (production ready and stable) kernel around.
There’s the BSD family, that has the most popular kernels besides Linux. I think there’s also a couple more use-case specialised ones like Illumos. And there’s some experimental kernels, like Hurd (I think there’s a Hurd/GNU Ubuntu or Debian official distro around) or RedoxOs