Some ports of Qt are now deprecated and are no longer actively developed. These are list of some of these platforms that may be available, but are not supported anymore:
"New Features in Qt 6.2 - Qt Wiki". wiki.qt.io. Retrieved 2021-10-18. https://wiki.qt.io/New_Features_in_Qt_6.2
"[New Features in Qt 5.1 - Support for New Platforms". Digia. 3 July 2013. Retrieved 3 July 2013. http://qt-project.org/wiki/New-Features-in-Qt-5.1#5c312afd70f65b592a63d7bb97add1c5
"Necessitas project". Archived from the original on 13 November 2012. Retrieved 3 December 2012. https://web.archive.org/web/20121113220147/http://necessitas.kde.org/
"Qt Wiki – Support for Embedded Linux". Qt Project. 12 August 2011. Retrieved 21 August 2013. http://qt-project.org/wiki/Support_for_Embedded_Linux
"Reference Target Devices and Development Hosts | Qt 5.13.0 for Device Creation". doc.qt.io. Retrieved 2019-07-27. https://doc.qt.io/QtForDeviceCreation/qtdc-supported-platforms.html
"Qt Product pages, Supported platforms". Qt - Product - Qt Framework. The Qt Company. Retrieved 21 November 2014. http://www.qt.io/qt-framework/#section-4
"Supported Platforms". Archived from the original on 2014-02-01. Retrieved 1 February 2014. https://archive.today/20140201130022/https://qt-project.org/doc/qt-5/supported-platforms.html
"[QTBUG-93206] Enable JIT for macOS on ARM - Qt Bug Tracker". bugreports.qt.io. Retrieved 2021-10-18. https://bugreports.qt.io/browse/QTBUG-93206
"Qt on Apple Silicon". www.qt.io. Retrieved 2021-10-18. https://www.qt.io/blog/qt-on-apple-silicon
"New Features in Qt 6.2 - Qt Wiki". wiki.qt.io. Retrieved 2021-10-18. https://wiki.qt.io/New_Features_in_Qt_6.2#Platform_Changes
"Qt 6.2 LTS Released". www.qt.io. Retrieved 2021-10-18. https://www.qt.io/blog/qt-6.2-lts-released
"Qt Wiki – Support for OS X". Qt Project. 14 August 2011. Retrieved 21 August 2013. http://qt-project.org/wiki/Support_for_Mac_OS_X
Qt Blog. "Qt Commercial Formally Supports QNX | Qt Blog". Blog.qt.digia.com. Archived from the original on 2013-10-08. Retrieved 2013-03-19. https://web.archive.org/web/20131008160705/http://blog.qt.digia.com/blog/2011/11/29/qt-commercial-formally-supports-qnx-2/
Qt Blog. "Qt Commercial for VxWorks | Qt Blog". Blog.qt.digia.com. Archived from the original on 2014-04-19. Retrieved 2013-03-19. https://web.archive.org/web/20140419044100/https://blog.qt.digia.com/blog/2012/06/28/qt-commercial-for-vxworks-2/
"Qt for VxWorks | Qt 5.13". doc.qt.io. Retrieved 2019-11-03. https://doc.qt.io/qt-5/vxworks.html
Jørgen Lind (18 March 2011). "Multi-process Lighthouse". Qt Project. Archived from the original on 2013-10-03. Retrieved 21 August 2013. https://web.archive.org/web/20131003171404/http://blog.qt.digia.com/blog/2011/03/18/multi-process-lighthouse/
"Getting started with Lighthouse". Retrieved 25 November 2011. http://qt-project.org/wiki/Getting_Started_With_Lighthouse
Kristian Høgsberg (25 January 2011). "Add wayland lighthouse plugin". Archived from the original on 14 May 2013. https://web.archive.org/web/20130514155010/http://qt.gitorious.org/%2Bqt-developers/qt/lighthouse/commit/6c5ea196ff086b92687033208f15e36591dc70f6
"Supported Platforms | Qt 5.13". doc.qt.io. Retrieved 2019-07-27. https://doc.qt.io/qt-5/supported-platforms.html
"Qt Wiki – Support for Windows". Qt Project. 11 August 2011. Retrieved 11 August 2013. http://qt-project.org/wiki/Support_for_Windows
Bjoern Breitmeyer (21 August 2013). "The State of WinCE Support in Qt5". KDAB. Archived from the original on 2013-08-18. Retrieved 21 August 2013. https://web.archive.org/web/20130818104109/http://blog.qt.digia.com/blog/2013/07/30/the-state-of-wince-support-in-qt5/
"Qt for WinRT". Qt Project. Retrieved 9 September 2014. http://qt-project.org/doc/qt-5/winrt-support.html
"Qt 4.6: Platform Notes - X11". doc.qt.io. Retrieved 2019-07-27. https://doc.qt.io/archives/4.6/platform-notes-x11.html#freebsd-6-0-release
"KDE on OpenSolaris". Hub.opensolaris.org. 26 October 2009. Archived from the original on 20 February 2010. Retrieved 13 November 2011. https://web.archive.org/web/20100220091414/http://hub.opensolaris.org/bin/view/Project+kde/
Qt4 for Haiku!, Qt for Haiku, 2017-03-11, retrieved 2019-11-03 https://github.com/qt-haiku/qt4
"Qt Applications and UI Framework for Haiku". Qt-haiku.ru. Archived from the original on 17 October 2012. Retrieved 13 November 2011. https://web.archive.org/web/20121017074201/http://qt-haiku.ru/
"Qt 4 Application and UI Framework for eCS". Svn.netlabs.org. 15 September 2011. Retrieved 13 November 2011. http://svn.netlabs.org/qt4
"Qt 5 QtWebengine status". Retrieved 2020-08-03. https://www.bitwiseworks.com/news/#2020
Qt webOS port[permanent dead link] http://gitorious.org/~darronb/qt/qt-palm-pre.git
darron (25 February 2010). "Blog: Qt on the Palm Pre". Griffin.net. Retrieved 13 November 2011. http://www.griffin.net/2010/02/qt-on-the-palm-pre.html
darron (30 January 2010). "Blog: Qt on Amazon Kindle DX". Griffin.net. Retrieved 13 November 2011. http://www.griffin.net/2010/01/hacking-the-amazon-kindle-dx-part-2-qt-and-sudoku.html
"Qt AmigaOS Native 4.7". Retrieved 5 August 2013. http://sourceforge.net/projects/qtamigaosnative/
Generationamiga. "Qt5 for AmigaOS 4 on Github". GenerationAmiga.com. Retrieved 2019-11-03. http://www.generationamiga.com/2017/03/28/qt5-for-amigaos-4-on-github/
alfkil, A branch of the famous Qt5 toolkit for our beloved platform.: alfkil/qt5-amigaos4, retrieved 2019-11-03 https://github.com/alfkil/qt5-amigaos4
"Qt for Tizen". Retrieved 15 December 2013. http://qt-project.org/wiki/Tizen
"Support for Symbian | Qt Wiki". Qt Project. 29 August 2012. Archived from the original on 2013-04-15. Retrieved 19 March 2013. https://archive.today/20130415194416/https://qt-project.org/wiki/Support-for-Symbian
"Qt for S60 – Forum Nokia Wiki". Wiki.forum.nokia.com. Archived from the original on 2011-08-16. Retrieved 13 November 2011. https://web.archive.org/web/20110816081028/http://www.developer.nokia.com/Community/Wiki/Qt_for_S60
"Nokia Announce Technology preview of Qt on S60". All About Symbian. 20 October 2008. Retrieved 13 November 2011. http://www.allaboutsymbian.com/news/item/8312_Nokia_Announce_Technology_prev.php
Paul, Ryan (20 October 2008). "Nokia releases first Qt preview for Symbian S60". ars technica. Retrieved 13 November 2011. https://arstechnica.com/news.ars/post/20081020-nokia-releases-first-qt-preview-for-symbian-s60.html
Espen Riskedal (20 October 2008). "Qt Labs Blogs – We're porting Qt to S60!". Labs.trolltech.com. Archived from the original on 16 March 2010. Retrieved 13 November 2011. https://web.archive.org/web/20100316135043/http://labs.trolltech.com/blogs/2008/10/20/were-porting-qt-to-s60
"Qt Software – Technology Preview – Qt for S60". Trolltech.com. Archived from the original on 2008-12-24. Retrieved 13 November 2011. https://web.archive.org/web/20081224140424/http://trolltech.com/developer/technical-preview-qt-for-s60
"David Wood: S60 / Avkon are dead". Tamss60.tamoggemon.com. Archived from the original on 2011-10-06. Retrieved 13 November 2011. https://web.archive.org/web/20111006144856/http://tamss60.tamoggemon.com/2009/08/04/david-wood-s60-avkon-are-dead/
"Qt Wiki – Support for Windows CE and Windows Mobile". Developer.qt.nokia.com. 12 August 2011. Archived from the original on 13 November 2011. Retrieved 13 November 2011. https://web.archive.org/web/20111113132828/http://developer.qt.nokia.com/wiki/Support_for_Windows_CE_and_Windows_Mobile
"Marking BB10 unsupported". 23 March 2015. Retrieved 17 October 2015. http://lists.qt-project.org/pipermail/development/2015-March/020811.html
"Qt Ubuntu". Launchpad.net. 29 January 2013. Retrieved 19 March 2013. https://launchpad.net/qtubuntu