“Neutrino is aimed at the embedded market, but it’s just as
happy on a standalone PC. It’s based on a microkernel, and offers a
fully POSIX compliant and Linux compatible API. As you’d
expect from any modern OS, Neutrino offers symmetric
multiprocessing and memory protection – indeed, all system
components – drivers, I/O managers, applications, etc. – run in
their own protected memory space.”
“Neutrino ships with its own X Window-compatible GUI, Photon,
complete with Web and email applications, and various media
players.”
“Neutrino’s core components – the microkernel and various OS
modules – are proprietary, but most of the higher level units are
available as source code under QNX’s GPL-style open source
licence.”