I think it's GTK, but since it's a Solus Linux project there was some talk that it would be moving to Qt soon. It reuses some chunks of GNOME 3 though. I like h

I think it's GTK, but since it's a Solus Linux project there was some talk that it would be moving to Qt soon. It reuses some chunks of GNOME 3 though. I like how it's seem to be a good alternative to Cinnamon desktop env., probably doen't have as many features but should be easy to use for Linux newbies (which GNOME3 isn't).