CTWM

{{Short description|Unix window manager}}

{{Infobox software

| name = CTWM

| screenshot = CTWM 3.7 Screenshot.png

| caption = CTWM 3.7 screenshot captured on Debian 7 Linux

| released = {{Start date and age|1992|05}}

| latest release version = {{wikidata|property|preferred|references|edit|Q4035698|P348|P548=Q2804309}}

| latest release date = {{wikidata|qualifier|preferred|single|Q4035698|P348|P548=Q2804309|P577}}

| latest preview version = {{wikidata|property|preferred|references|edit|Q4035698|P348|P548=Q51930650}}

| latest preview date = {{wikidata|qualifier|preferred|single|Q4035698|P348|P548=Q51930650|P577}}

| programming language = C

| genre = Window manager

| license = X11-X11R5{{cite web|url=https://enterprise.dejacode.com/licenses/public/x11-x11r5/|title=Licenses: X11-R5 (x11-x11r5)}}
MIT-CMU{{cite web|url=https://spdx.org/licenses/MIT-CMU.html|title=CMU License}}{{cite web |url=https://bazaar.launchpad.net/~ctwm/ctwm/trunk/view/head:/COPYRIGHT |title = ~ctwm/ctwm/trunk : contents of COPYRIGHT at revision 691}}

| repo = {{URL|https://code.launchpad.net/~ctwm/ctwm/trunk}}

| website = {{URL|https://www.ctwm.org}}

}}

In Unix computing, CTWM (Claude's Tab Window Manager) is a stacking window manager for the X Window System in the twm family of window managers. CTWM was created in 1992 by Claude Lecommandeur of EPFL from the source code for twm, which he extended to allow for virtual desktops ("workspaces" in CTWM's terminology),{{Cite web |title=Modernizing ctwm |url=https://troubleshooters.com/linux/ctwm/modernize.htm |access-date=2024-05-06 |website=troubleshooters.com}} an innovative feature at the time for a window manager; his inspiration was vuewm, an early Unix desktop environment.{{Cite web |last=Anon. |title=CTWM Home |url=https://www.ctwm.org/index.html |access-date=2024-06-02 |website=Claude's Tab Window Manager}} Later additions and modifications have since changed the original twm codebase significantly,{{Citation |last=Cherven |first=Jamie |title=jcherven/ctwm |date=2021-04-09 |url=https://github.com/jcherven/ctwm |access-date=2024-05-28}} providing for a highly customizable user interface. The project is currently (2024) maintained by Matthew Fuller.{{Cite web |last=Anon. |date= |title=CTWM Home |url=https://www.ctwm.org/index.html |access-date=2024-04-18 |website=Claude's Tab Window Manager}} CTWM has been the default graphical user interface for NetBSD{{Cite web |last=Proven |first=Liam |date=2024-04-17 |title=NetBSD turns 30 and releases version 10 |url=https://www.theregister.com/2024/04/17/30yo_netbsd_releases_v10/ |access-date=2024-04-18 |website=www.theregister.com |language=en}} since 2020 (release 9.1), replacing twm.{{Cite web |last=Plura |first=Michael |date=2020-10-26 |title=NetBSD 9.1 mit mehr ZFS und "neuem" Fenstermanager CTWM |url=https://www.heise.de/news/NetBSD-9-1-mit-mehr-ZFS-und-neuem-Fenstermanager-CTWM-4938633.html |access-date=2024-04-18 |website=heise online |language=de}}