bug.n is described as 'Tiling window manager add-on for Microsoft Windows. It is written in the scripting language AutoHotkey' and is a Window Manager in the news & books category. There are more than 50 alternatives to bug.n for a variety of platforms, including Linux, Windows, Wayland, BSD and Mac apps. The best bug.n alternative is Hyprland, which is both free and Open Source. Other great apps like bug.n are Noctalia, niri, Sway and i3.
The NERDTree is a file system explorer for the Vim editor. Using this plugin, users can visually browse complex directory hierarchies, quickly open files for reading or editing, and perform basic file system operations.
I don't like NERD tree as an alternative to bug.n because it's just a vim plugin for browsing file system.
Emerge Desktop is a replacement Windows "shell" (the desktop environment normally provided by Windows Explorer) for Windows 2000 and above. In order to replace Windows Explorer as a shell, it provides a system tray (the area that collects the icons collected at the...
spectrwm is a small dynamic tiling window manager for X11. It tries to stay out of the way so that valuable screen real estate can be used for much more important stuff. It has sane defaults and does not require one to learn a language to do any configuration.
SharpEnviro (or SharpE) is an open source shell replacement system for Microsoft Windows XP, Windows Vista and Windows 7. When using SharpEnviro the default Windows desktop is replaced by a new and more powerful desktop environment.
BB4Win (Blackbox for Windows) is an alternative shell for Microsoft Windows. The program aims to emulate the look and feel of a Linux based desktop. The BB4Win project was discontinued in 2005 but various branches have been built from the source.
wmii is a small, dynamic window manager for X11. It is scriptable, has a 9p filesystem interface and supports classic and tiling (acme-like) window management. It aims to maintain a small and clean (read hackable and beautiful) codebase.
JWM is a light-weight window manager for the X11 Window System. JWM is written in C and uses only Xlib at a minimum. Because of its small footprint, JWM makes a good window manager for older computers and less powerful systems, such as the .
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NERD tree has absolutely nothing to do with desktop window management, and should never have been listed as an alternative.