Witch - Welcome to the world of W. i. t. c. h.
pekwm - pekwm is a window manager that once up on a time was based on the aewm++ window manager, but it has...
Hyperswitch - HyperSwitch provides a compelling alternative to HyperDock for keyboard junkies. What's New
qtile - Qtile is a full-featured, hackable tiling window manager written in Python.
Contexts - Switch between application windows effortlessly — with Fast Search, a better Command-Tab, a Sidebar or even a quick gesture. Free trial available.
herbstluftwm - herbstluftwm is a manual tiling window manager for X11 using Xlib and Glib.