QNX Desktop - that would be neutrino with the photon GUI.
Yes, it was nice, brilliant, shiny, cool, fast, glorious, fanstatic ... and then some jackass ported GTK to it, and all native development vanished as all devs instead wasted time porting halfassed GTK applications that never really worked well. Users soon found out that the very same GTK apps worked much better on Linux or whateverBSD so why run Neutrino? At least that's how I experienced it.
The other part was that they were waaay slow to develop hardware drivers, I remember communicating with one guy at QSSL doing PCMCIA drivers, and from whay I understood, it was just him. Him and a huge pile of PCMCIA cards.
I still get invites from QSSL/QNX regarding various seminars/conferences/workshops they are holding every now and then.
