The best replacement for window manager is desktop manager.

The best alternatives to window manager are rated as following:
★★★★★  desktop manager
★★★★★  window system
★★★★  display manager
★  desktop environment

Your alternative for window manager is not listed? Suggest!
Speaking about window manager, one probably shouldn't forget about x.

Other search terms related to window manager and their ratings are:
★★★★★ x
★★★★ x11
★ x server
You have in mind a companion for window manager and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of window manager in all years. Click on graph for more.
window manager
desktop manager
window system