I haven't used it in a while but Tcl/Tk with Tile (now known as ttk) used to be a decent solution for cross-platform GUIs with native-looking widgets. Among

I haven't used it in a while but Tcl/Tk with Tile (now known as ttk) used to be a decent solution for cross-platform GUIs with native-looking widgets. Among other things it had top-tier Unicode support and a declarative layout system (compare: QML). Is it still viable?