Window numbers for Emacs: Navigate your windows and frames using numbers. This package is an extended and actively maintained version of the https://github.com/nschum/window-numbering.el package by Nikolaj Schumacher, with some ideas and code taken from https://github.com/abo-abo/ace-window. This version brings, among other things, support for number sets across multiple frames, giving the user a smoother experience of multi-screen Emacs.