Alternatives to JWM
Joe's Window Manager, a lightweight stacking window manager for X11 written in C. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
JWM
Joe's Window Manager, a lightweight stacking window manager for X11 written in C.
Replacements
Listings that take over the same core job as JWM.
IceWM
A lightweight X11 window manager with a taskbar, workspaces and a familiar Windows-like layout.
IceWM is another lightweight X11 window manager for older machines, adding a built-in taskbar, tray, menu and a large collection of themes.
Openbox
Manage X11 windows with a configurable stacking window manager.
Openbox is a configurable X11 stacking window manager with custom menus and window rules, needing separate panels and launchers for a complete desktop.
FVWM3
A highly configurable X11 window manager, the successor to fvwm2, with multi-monitor support.
FVWM3 is a lightweight X11 window manager with extremely configurable behaviour and RandR multi-monitor support, but its configuration has a steep learning curve.
Window Maker
An X11 stacking window manager that reproduces the look and feel of NeXTSTEP.
Window Maker is a light X11 stacking window manager with a NeXTSTEP look, dockapps and a graphical preferences tool.
labwc
A lightweight wlroots-based stacking Wayland compositor inspired by Openbox.
labwc is a lightweight stacking compositor inspired by Openbox that runs on Wayland only, needing separate programs for a full desktop.
Similar software
Related functionality, not a direct replacement.
Tint2
Lightweight panel and taskbar for Linux and BSD window managers.
picom
A lightweight standalone compositor for X11 that adds shadows, transparency, blur, fading and animations.
BunsenLabs Linux
A Debian-based distribution with a preconfigured, lightweight Openbox desktop, continuing CrunchBang Linux.
LXQt
A lightweight, modular Qt-based desktop environment for Linux and BSD with X11 and Wayland sessions.
rofi
A keyboard-driven window switcher, application launcher and dmenu replacement for Linux desktops.