**Window Managers:**
1. **Blackbox**: A minimalist window manager that is simple to use and configure.
2. **Fluxbox**: Another lightweight window manager with more features than Blackbox, including support for themes and plugins.
3. **Openbox**: A highly customizable and flexible window manager with a wide range of configuration options.
**Additional Window Managers:**
1. **awesome**: A highly configurable and extensible window manager that uses the Lua programming language.
2. **bspwm**: A tiling window manager based on the binary space partitioning algorithm, known for its simplicity and efficiency.
3. **dwm**: A dynamic window manager written in C, designed to be small and fast.
4. **Enlightenment**: A highly customizable and extensible desktop environment that includes a window manager.
5. **i3**: A tiling window manager that focuses on simplicity and ease of use.
6. **IceWM**: A lightweight window manager with a focus on usability and customization.
7. **LXDE (Lightweight X11 Desktop Environment)**: A collection of lightweight applications and tools, including a window manager called Openbox.
8. **MATE (GNOME 2 fork)**: A desktop environment that includes a window manager.
9. **Musca**: A minimalistic window manager designed for simplicity and ease of use.
10. **Qtile**: A highly customizable and extensible tiling window manager written in Python.
11. **Sawfish**: A window manager that uses the Lisp programming language to provide customization options.