exwm: Emacs X Windows Manager

EXWM (Emacs X Window Manager) is a full-featured tiling X window manager for Emacs built on top of XELB.

exwm GitHub page

It supports both tiling and stacking windows, dynamic workspaces, RandR, a system tray, and a lot more. XELB stands for X protocol Emacs Lisp Binding, and it's a pure Elisp implementation of X11 protocol based on the XML description files from XCB project".