This is a port of OpenBSD's excellent cwm[0] to Linux and other Unices.
 cwm is a window manager for X11 which contains many features that
 concentrate on the efficiency and transparency of window
 management. cwm also aims to maintain the simplest and most
 pleasant aesthetic.
This port requires pkg-config, Xft, Xinerama and Xrandr. The included Makefile
should work with both GNU make and BSD make. It has been built successfully on
OpenBSD, FreeBSD, NetBSD, OS X 10.9 and Linux.
This version actively tracks changes in the OpenBSD CVS repository.
Releases are roughly coordinated.
The revision controlled version is at https://github.com/leahneukirchen/cwm
Releases can be found at http://leahneukirchen.org/releases
You are welcome to join the IRC channel ##cwm on irc.libera.chat
to talk about cwm.
ChangeLog:
2012年05月02日: First public release 5.1 of portable cwm.
2014年04月13日: Second public release 5.5 of portable cwm.
User visible changes (for a full list including smaller bug fixes, see
http://www.openbsd.org/plus.html ff.)
Changes made between OpenBSD 5.1 and 5.2
* Fixed cwm(1) atom (WM_PROTOCOLS) style handing; closing a window will no
 longer close entire application if the client supports CLIENT_PROTO_DELETE.
* Re-implement atom handing for more consistent separation of cwm(1) and
 Extended Window Manager Hints.
* cwm(1) better integrated into the freedesktop.org Window Manager
 Specification Project.
Changes made between OpenBSD 5.2 and 5.3
* Set the initial cwm(1) group to "1".
* Added cwm(1) per-group vert/horiz tiling support with new bind commands
 "vtile" and "htile."
* Made cwm(1) screen font an Xft(3) font.
* Specific last match for autogroup in cwmrc(5).
* Tab completion support for cwm(1) menus.
* Allow cwm(1) clients to be resized from a max state.
* Multibyte input to cwm(1) menu code now possible.
Changes made between OpenBSD 5.3 and 5.4
* Added support for mouse based group {,r}cycle to cwmrc(5).
* Allow mouse button4 and button5 in cwmrc(5).
* Made cwm(1) check for, and honour, CWStackMode and CWSibling change requests
 during a ConfigureRequest event.
* Honour PATH search order for cwm(1)'s exec.
Changes made between OpenBSD 5.5 and 5.4
* Only set the cwm(1) urgency flag if the client is not active.
* Allow the cwm(1) config parser continue parsing even after encountering an
 error.
* cwm(1) now follows the EWMH spec: if the cardinal returned is 0xFFFFFFFF (-1)
 then the window should appear on all desktops.
* Made cwm(1) supply a more useful title for windows launched via the ssh(1)
 command menu ("[ssh] ").
* Allowed cwm(1) to accept _NET_WM_DESKTOP and _NET_CURRENT_DESKTOP
 ClientMessage.
* Implemented cwm(1) support for _NET_WM_STATE_FULLSCREEN hint, with keybinding
 changes: CM-f "fullscreen", CM-m "maximize".
* Instead of using the work area, use the Xinerama area for cwm(1) snap
 calculations.
* Save-set when cwm(1) is re-exec'ing so as to not lose State on our hidden
 clients.
* Added cwmrc(5) support for XUrgency and matching
 _NET_WM_STATE_DEMANDS_ATTENTION ewmh hint, with configurable urgencyborder.
* Prepend the group shortcut in the cwm(1) client search menu;
 prepend shortcut in unhide menu.
* If not hidden during an UnmapNotify event, cwm(1) will now un-manage the
 client.
* Like "gap", made cwm(1) "snapdist" per-screen.
* Removed cwmrc(5) option to bind a key by keycode with brackets, which never
 worked. Users should be using keysym names not keycodes.
* Re-added cwm(1) support for WM_TAKE_FOCUS. Solves keyboard input focus loss
 for java apps.
* For cwm(1) clients that support WM_TAKE_FOCUS in their WM_PROTOCOLS property,
 send a ClientMessage event.
2015年01月24日: Third public release 5.6 of portable cwm.
* Support building on FreeBSD and OS X.
* Support for sticky windows (_NET_WM_STATE_STICKY).
* Internal cleanups and bug fixes.
Changes made between OpenBSD 5.6 and 5.7
* Implemented _NET_WM_STATE_STICKY in cwm(1). Allows client to "stick"
 to all desktops or groups.
* Ensure cwm(1) client that wants to be in nogroup stays in nogroup
 (thus stays in view), even when (re)reading NET_WM_DESKTOP. 
Changes made between OpenBSD 5.7 and 5.8
* In cwm(1), introduce "groupsearch" for group menu search. 
* In cwm(1), show an empty "ssh to" menu if the known_hosts file is missing. 
* In cwm(1), replace screen region info gathering with XRandR
 equivalent of Xinerama queries. 
Changes made between OpenBSD 5.8 and 5.9
* Don't allow freeze operations on fullscreen.
* Implement _NET_CLIENT_LIST_STACKING. 
2017年10月17日: Fourth public release 6.2 of portable cwm.
Changes made between OpenBSD 6.2 and 6.3
* Fix blocking bug during moving or resizing.
* window-snap-* commands to move windows to edges and corners.
* Add support for _NET_WM_STATE_SKIP_PAGER and _NET_WM_STATE_SKIP_TASKBAR.
* Add support for re-exec'ing with SIGHUP.
2018年05月14日: Fifth public release 6.3 of portable cwm.
2020年01月04日: Sixth public release 6.6 of portable cwm.
Changes made between OpenBSD 6.4 and 6.5
* Added a configtest flag (-n) to cwm(1).
* Introduced 'group-close-[n]' action to cwm(1) to close all windows
 within a specified group.
2020年05月22日: Seventh public release 6.7 of portable cwm.
Changes made between OpenBSD 6.6 and 6.7
* Allowed cwm(1) configuration of window size based on percentage of
 the master window during horizontal and vertical tiling actions.
* Allowed use of window-htile and window-vtile with the "empty" group
 clients in cwm(1).
2022年04月30日: Eighth public release 7.1 of portable cwm.
Changes made between OpenBSD 6.9 and 7.0
* Changed cwm(1) maximization and full-screen mode toggling to keep
 the cursor within the window, preventing focus loss.
Changes made between OpenBSD 7.0 and 7.1
* Added a cwm(1) "group-last" command that shows only the previously
 active group.
* Allowed bare numbers for key and mouse bindings in cwm(1).
2023年10月20日: Ninth public release 7.4 of portable cwm.
Changes made between OpenBSD 7.3 and 7.4:
* Allow cwm(1) to cycle through windows of the same window class as
 the active window, default key binding to M-grave, respectively
 Alt-Tilde, like with other window managers.
--Leah Neukirchen <leah@vuxu.org>
[0]: http://cvsweb.openbsd.org/cgi-bin/cvsweb/xenocara/app/cwm/