What is worth additional mentioning is PhAB (Photon Application Builder). It was a visual (like in Visual Basic) RAD C++ GUI app builder which came bundled with

What is worth additional mentioning is PhAB (Photon Application Builder). It was a visual (like in Visual Basic) RAD C++ GUI app builder which came bundled with the OS and accompanied by a great tutorial. It was so great, I bloody wish its clone was available for Linux (and Haiku perhaps). I also miss Photon's visual style. Subjectively, it was the best I've ever seen (and Haiku feels somewhat close to this taste actually). If somebody would offer a bundle of Linux (XFCE, GNOME, KDE) and Windows (10) themes resembling QNX 6 Photon I would buy them for some real money.