HURD is the default GNU kernel. From what I here there are also GNU systems running on BSD'd stuff, and I suspect they're are many GNU systems running with Kernels users have created themes, whether for very specific use cases or just for fun. I recall following someone's blog an Diaspora* about the latter a year ago until she got bored with it.
Considering that Hurd is still not finished what other kernel does GNU use other than Linux?
HURD is the default GNU kernel. From what I here there are also GNU systems running on BSD'd stuff, and I suspect they're are many GNU systems running with Kernels users have created themes, whether for very specific use cases or just for fun. I recall following someone's blog an Diaspora* about the latter a year ago until she got bored with it.