{{Short description|Application platform}} {{Redirect|Qtopia|the museum in Sydney, Australia|Qtopia Sydney}} {{Infobox OS | name = Qt Extended | logo = | screenshot = | caption = | developer = The Qt Company | family = Linux | source_model = | working_state = Discontinued | latest_release_version = 4.4.3 | latest_release_date = {{Start date and age|2009|03|5}} | kernel_type = Monolithic kernel | license = GPL and proprietary }}

'''Qt Extended''' (named '''Qtopia''' before September 30, 2008) is an application platform for embedded Linux-based mobile computing devices such as personal digital assistants, video projectors and mobile phones. It was initially developed by The Qt Company, at the time known as Qt Software and a subsidiary of Nokia. When they cancelled the project the free software portion of it was forked by the community and given the name '''Qt Extended Improved'''. The '''QtMoko''' Debian-based distribution is the natural successor to these projects as continued by the efforts of the Openmoko community.<ref>[http://wiki.openmoko.org/wiki/QtMoko QtMoko page] on the Openmoko Wiki.</ref><ref>[https://sourceforge.net/projects/qtmoko/ QtMoko distribution] on SourceForge.com.</ref>

== Features == Qt Extended features: * Windowing system * Synchronization framework * Integrated development environment * Internationalization and localization support * Games and multimedia * Personal information manager applications * Full screen handwriting * Input methods * Personalization options * Productivity applications * Internet applications * Java integration * Wireless support

Qt Extended is dual licensed under the GNU General Public License (GPL) and proprietary licenses.

== Devices and deployment == As of 2006, Qtopia was running on several million devices, including 11 mobile phone models and 30 other handheld devices.<ref>[http://www.linuxelectrons.com/news/mobile/trolltech-announces-qtopia-mobile-phone-linux Trolltech Announces Qtopia With Mobile Phone For Linux (Published: Tuesday, August 15 2006 @ 8:34 PM CDT Contributed by: Tommy) LinuxElectrons:]</ref>

Models included the Sharp Corporation Zaurus line of Linux handhelds, the Sony mylo, the Archos Portable Media Assistant (PMA430) (a multimedia device), the GamePark Holdings GP2X, Greenphone (an open phone initiative), Pocket PC, FIC Openmoko phones: Neo 1973 and FreeRunner. An unofficial hack allows its use on the Archos wifi series of portable media players (PMP) 604, 605, 705, and also on several Motorola phones such as E2, Z6 and A1200. The U980 of ZTE is the last phone running it.

== Software development == Native applications could be developed and compiled using C++.<ref>{{cite web | url=https://lwn.net/Articles/258453/ | title=Google's phone initiative: Android [LWN.net]}}</ref> Managed applications could be developed in Java.

{{Infobox OS| name = Qt Extended Improved | logo = | screenshot = Qtmoko v26 Desktop.png | caption = | developer = Qt Extended Improved Project | family = Linux | source_model = | latest_release_version = 4.5.2 | latest_release_date = {{Start date and age|2009|06|28}} | kernel_type = Monolithic kernel | license = GPL and proprietary | website = {{URL|wiki.openmoko.org/wiki/Qt_Extended_Improved}} }}

== Discontinuation == On March 3, 2009, Qt Software announced the discontinuation of Qt Extended as a standalone product, with some features integrated on the Qt Framework.<ref>{{cite web | url=http://www.qtsoftware.com/about/news/qt-software-discontinues-qt-extended | title=Qt Software discontinues Qt Extended | url-status=dead | archive-url=https://web.archive.org/web/20090308203837/http://www.qtsoftware.com/about/news/qt-software-discontinues-qt-extended | archive-date=2009-03-08 }}</ref>

== {{anchor|QtMoko}} Qt Extended Improved == The Openmoko community has forked<ref>{{cite web | url=http://wiki.openmoko.org/wiki/Qt_Extended_Improved | title=Openmoko wiki – Qt Extended Improved | url-status=dead | archive-url=https://web.archive.org/web/20120523100545/http://wiki.openmoko.org/wiki/Qt_Extended_Improved | archive-date=2012-05-23 }}</ref> the final stable release into '''Qt Extended Improved''' (later renamed to '''QtMoko''')<ref>{{cite web | url=https://qtmoko.sourceforge.net/ | title=qt moko homepage}}</ref> which, like its predecessor, is an application platform for embedded Linux-based mobile computing devices such as personal digital assistants, video projectors and mobile phones dual licensed under the GNU General Public License (GPL) and proprietary licenses.

Qt Extended Improved can run on several mobile devices, most notably the Openmoko phones: Neo 1973 and FreeRunner.

== Other mobile operating systems == * Access Linux Platform * Android * iOS * MeeGo * Nucleus RTOS * Openmoko Linux * Palm webOS * Symbian * Tizen * Windows Mobile [[File:Extension.QPK.png|alt= |thumb|framelessQt Extended data structure file]]

== References == {{Reflist}}

== External links == {{Portal|Free and open-source software}} * [https://web.archive.org/web/20090302081224/http://www.qtsoftware.com/files/pdf/qt-extended-4.4-whitepaper Qt Extended Whitepaper] from Qt Software * {{cite web |title=Qtopia Screenshots |url=http://qtextended.org/themes/Trolltech/screens.php |access-date=29 June 2009 |publisher=Trolltech |url-status=dead |archive-url=https://web.archive.org/web/20090228232015/http://qtextended.org/themes/Trolltech/screens.php |archive-date=February 28, 2009 }}

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<!-- Categories --> Category:Embedded Linux Category:Mobile Linux Category:Mobile software Category:Openmoko Category:Personal digital assistant software Category:Software forks Category:Software that uses Qt