It's been a while since I played with Services-For-Unix, but I recall it's better than Cygwin in that it's not a POSIX shim sitting on top of Win32, but actually sits beside Win32 on top of the NT kernel (which was always designed to support POSIX to some degree). It integrates the POSIX notion of user IDs with ActiveDirectory, etc.
Where it all falls down, of course, is the usual bane of proprietary unicies - packaging. I think there's a 'freeware' site with tarballs of various useful tools you can download, but nothing approaching even Cygwin's small and limited packaging and upgrade system, let alone a real distro like Debian.
Where it all falls down, of course, is the usual bane of proprietary unicies - packaging. I think there's a 'freeware' site with tarballs of various useful tools you can download, but nothing approaching even Cygwin's small and limited packaging and upgrade system, let alone a real distro like Debian.