Of course this title is completely arbitrary and assigned by me making it kind of pointless but it's a great piece of software.
Q is based on the excellent open source CPU emulator QEMU from Fabrice Bellard. Pierre d'Herbemont from stegefin.free.fr ported QEMU to OS X and initiated a cocoa Version.
That was the initialization for Mike to develop Q. A completely rewritten cocoa port of QEMU, built directly on OS X, making use of Apples Core-technologies like Coreimage, Coreaudio and OpenGL for in- and output, saving the overhead of crossplattform APIs like SDL, FMOD or GTK.
If you are running a G4 or G5 like me and are looking for an open source way to run X86 software you should give 'Q' a try. It's been great to me.