Fri .19 Sep 2019
TR | RU | UK | KK | BE |

Qt Project

qt project, qt project downloads
The Qt Project is a project to co-ordinate the development of the Qt software framework The project was founded by Nokia,1 and has been now led by Digia’s subsidiary The Qt Company since it acquired Qt software technologies, trademarks, and personnel from Nokia2


  • 1 History
  • 2 Governance
  • 3 Participating organizations
  • 4 See also
  • 5 External links
  • 6 References


See also:List of Qt releases

Haavard Nord and Eirik Chambe-Eng the original developers of Qt and the CEO and President, respectively, of Trolltech began development of "Qt" in 1991, three years before the company was incorporated as Quasar Technologies, then changed the name to Troll Tech and then to Trolltech3

Until version 145, source code for Qt was released under the Qt Free Edition License4 This was viewed as not compliant with the open source principle by the Open Source Initiative and the free software definition by Free Software Foundation because, while the source was available, it did not allow the redistribution of modified versions

Controversy arose around 1998 when it became clear that KDE’s K Desktop Environment was going to become one of the leading desktop environments for Linux As it was based on Qt, many people in the free software movement worried that an essential piece of one of their major operating systems would be proprietary

With the release of version 20 of the toolkit, the license was changed to the Q Public License QPL, a free software license but one regarded by the Free Software Foundation as incompatible with the GPL Compromises were sought between KDE and Trolltech whereby Qt would not be able to fall under a more restrictive license than the QPL, even if Trolltech was bought out or went bankrupt This led to the creation of the KDE Free Qt Foundation which guarantees that Qt would fall under a BSD-style license should no free/open source version of Qt be released during 12 months5

In 2000, Qt 22 was released under the GPL v2, ending all controversy regarding GPL compatibility6

On 28 January 2008 Nokia announced to acquire Trolltech78

On 14 January 2009 Qt version 45 was relicensed, adding LGPL as licensing option9

The Qt Project was founded on 21 October 2011110 In August 2012 Digia announced to acquire all rights to Qt and take Nokia’s role within the Qt Project2


The Qt Project is not a separate legal entity or organization; Digia retains all trademarks around Qt1112

Qt's Open Governance is modelled after WebKit's1314

Decision-making takes place in a process the project describes as "lazy consensus"15

The project facilitates online communication among its developers and community members through public forums,16 mailing lists,17 and wiki pages18

Participating organizationsedit

Distribution of non-Digia Qt contributors 2013, Week 18

Aside from the project leader Digia and various individuals, a number of other organizations participate in the Qt Project19 Second-largest Qt contributor is KDAB, a Swedish Qt consulting company20 KDAB is involved in many areas, including maintenance of several components2122 KDAB together with RIM/BlackBerry are maintaining the QNX and BlackBerry 10 ports of Qt1923

Another big participator is Intel, contributing for example Wayland support24 AudioCodes maintains IBM ClearCase support in Qt Creator25

Various individuals from KDE implement features from KDE Frameworks in Qt26

See alsoedit

  • KDE eV

External linksedit

  • Official website
  • Qt website
  • KDE Free Qt Foundation
  • Qt Project statistics updated weekly


  1. ^ a b Lydia Pintscher 21 October 2011 "KDE Applauds Qt's Move to Open Governance" KDENews Retrieved 2013-05-08 
  2. ^ a b "Digia to acquire Qt from Nokia" Digiacom Retrieved 2013-03-19 
  3. ^ "A Brief History of Qt" Retrieved 20 December 2007 
  4. ^ "Qt Free Edition License" Trolltech 1992 Retrieved 14 October 2016 
  5. ^ "Free Qt Foundation" KDE Retrieved 2013-05-08 
  6. ^ "Trolltech to Release Qt Under GPL - Decision Alters Linux GUI Landscape - Reports" LinuxPlanet 2000-09-04 Retrieved 2013-05-08 
  7. ^ "Nokia to acquire Trolltech to accelerate software strategy" 28 January 2008 Retrieved 28 January 2008 
  8. ^ Paul, Ryan 2008-01-28 "Nokia to buy Trolltech, will become a patron of KDE" Ars Technica Retrieved 2013-05-08 
  9. ^ "Qt Everywhere:45 To Be Relicensed As LGPL" Retrieved 2013-05-08 
  10. ^ Meyer, David 2011-10-24 "Nokia gives Qt open-source governance" ZDNet Retrieved 2013-05-08 
  11. ^ "About us - Digia Plc" Qtdigiacom 2011-09-13 Retrieved 2013-05-08 
  12. ^ "Qt Project" Qt Project Retrieved 2013-05-08 
  13. ^ "Nokia:Qt 5 soll im April 2012 erscheinen" in German Golemde 2011-06-16 Retrieved 2013-05-08 
  14. ^ Anita Klingler 2011-10-24 "Nokia startet Qt-Projekt mit unabhängiger Infrastruktur" in German Zdnetde Retrieved 2013-05-08 
  15. ^ "The_Qt_Governance_Model | Qt Wiki" Qt Project 2012-09-25 Retrieved 2013-05-08 
  16. ^ "forums" Qt Project Retrieved 2013-05-08 
  17. ^ "Mailing Lists" Listsqt-projectorg Retrieved 2013-05-08 
  18. ^ "index | Qt Wiki" Qt Project 2013-03-29 Retrieved 2013-05-08 
  19. ^ a b Macieira, Thiago "Qt Project Statistics" Thiago Macieira's blog Macieiraorg Retrieved 2013-05-08 
  20. ^ "contributions to Qt 50 part 1" KDAB 2012-12-20 Retrieved 2013-05-08 
  21. ^ "contributions to Qt 50 part 2" KDAB 2012-12-21 Retrieved 2013-05-08 
  22. ^ "Maintaining Qt3D" KDAB 2012-12-21 Retrieved 2013-05-08 
  23. ^ "Qt5 on the QNX operating system" KDAB 2012-04-19 Retrieved 2013-05-08 
  24. ^ "Phoronix Qt Is Now Drawing On Wayland" Phoronixcom 2010-09-21 Retrieved 2013-05-08 
  25. ^ "Maintainers | Qt Wiki" Qt Project 2013-04-12 Retrieved 2013-05-08 
  26. ^ "Frameworks/Epics/Contributions to Qt5" KDE Community Wiki Retrieved 2015-04-27 

qt project, qt project download, qt project downloads, qt project file, qt project file variables, qt project open source, qt, qt projects, qt projects download, qt projects with subproject

Qt Project Information about

Qt Project

  • user icon

    Qt Project beatiful post thanks!


Qt Project
Qt Project
Qt Project viewing the topic.
Qt Project what, Qt Project who, Qt Project explanation

There are excerpts from wikipedia on this article and video

Random Posts

Amorphous metal

Amorphous metal

An amorphous metal also known as metallic glass or glassy metal is a solid metallic material, usuall...
Arthur Lake (bishop)

Arthur Lake (bishop)

Arthur Lake September 1569 – 4 May 1626 was Bishop of Bath and Wells and a translator of the King Ja...
John Hawkins (author)

John Hawkins (author)

Sir John Hawkins 29 March 1719 – 21 May 1789 was an English author and friend of Dr Samuel Johnson a...
McDonnell Douglas MD-12

McDonnell Douglas MD-12

The McDonnell Douglas MD-12 was an aircraft design study undertaken by the McDonnell Douglas company...