openSUSE:Leap:42.2 openSUSE Leap 42.2 https://download.opensuse.org/distribution/leap/42.2/repo/oss/ gtk3-engine-unico Gtk3 theming engine Unico is a GTK+ engine that aims to be the more complete yet powerful theming engine for Gtk3. It’s the first Gtk+ engine written with Gtk+ style context APIs in mind, using CSS as first class citizen.