Openbox is a window manager for the X11 windowing system. It was originally based on Blackbox and currently remains very similar, even using Blackbox styles (with available extensions) for its themeing.
Openbox works with your applications, and makes your desktop easier to manage. This is because the approach to its development was the opposite of what seems to be the general case for window managers. Openbox was written first to comply with standards and to work properly. Only when that was in place did the team turn to the visual interface.
Openbox is fully functional as a stand-alone working environment, or can be used as a drop-in replacement for the default window manager in the GNOME or KDE desktop environments.
Openbox is designed to be small, fast, and fully compliant with the Inter-Client Communication Conventions Manual (ICCCM) and Extended Window Manager Hints (EWMH).
Key Features
- Very fast.
- Anti Aliased fonts.
- NetWM support.
- Chainable key bindings.
- Customizable mouse actions.
- Window resistance (Window-to-Window and Window-to-Edge snapping).
- Placement options:
- Smart.
- Cascade.
- Under Mouse.
- Click Mouse.
- Multi-head Xinerama support.
- Pipe menus.
- Workspace warping.
- Customizable style engine.
- Windowmaker Dock App support.
- Toolbar.
Website: openbox.org
Support: Documentation
Developer: Mikael Magnusson, Dana Jansens, Derek Foreman, Tore Anderson, Audun Hove and others
License: GNU General Public License v2.0

Openbox is written in C. Learn C with our recommended free books and free tutorials.
Related Software
| Stacking Window Managers | |
|---|---|
| Openbox | Standards compliant, fast, light-weight, extensible window manager |
| KWin | Window manager for the KDE Plasma Desktop |
| Mutter | Wayland display server and X11 window manager and compositor library |
| FVWM | Powerful ICCCM-compliant multiple virtual desktop window manager |
| berry | Healthy, bite-sized window manager |
| xfwm | Part of the Xfce desktop environment |
| Window Maker | NeXTSTEP-like window manager |
| JWM | Joe’s Window Manager |
| Gala | Designed by elementary for use with Pantheon |
| Fluxbox | Highly configurable and low resource |
| evilwm | Maximises screen real estate and provides good keyboard control |
| Worm | Tiny, dynamic, tag-based window manager |
| Blackbox | Similar to the NeXT interface and Window Maker |
| Enlightenment | Focuses on pushing the limits of existing technologies |
| PekWM | Originally based on the aewm++ window manager |
| Marco | MATE default window manager |
| 2bwm | Offers 2 borders, and written over the XCB library |
| cwm | OpenBSD fork of calmwn, a clean and lightweight window manager |
| IceWM | Win95-OS/2-Motif-like window manager |
| Sawfish | Extensible window manager using an Emacs Lisp-like scripting language |
| Moksha | Modern iteration of the Enlightenment window manager |
| Magpie | X11 window manager and compositor library |
| sowm | Itsy bitsy floating window manager |
| Compiz | OpenGL window and compositing manager |
Read our verdict in the software roundup.
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