QNX Neutrino (2001) has been ported to a number of platforms and now runs on practically any modern CPU that is used in the embedded market. This includes the PowerPC, x86 family, MIPS, SH-4 and the closely related family of ARM, StrongARM and XScale CPUs
So in theory they have an x86 os for the unix based QNX operating system.
Though I havn't found where you can download a free distro of it or if they allow that. On there download page they have alot of developing software for there os stuff. But I don't really see where you can download the x86 version.
Maybe they don't provide this :(