Qt is a comprehensive, object-oriented development framework that enables development of high-performance, cross-platform rich-client and server-side applications. When you implement a program with Qt, you can run it on the X Window System (Unix/X11), Apple Mac OS X, and Microsoft Windows NT/9x/2000/XP by simply compiling the source code for the platform you want. Qt is the basis for the KDE desktop environment, and is also used in numerous commercial applications such as Google Earth, Skype for Linux, and Adobe Photoshop Elements.

Operating Systems

RSS Last announcement

Qt Project Announcement 05 Nov 2011

At the end of October the Qt Project went live. This means that development of Qt will be governed as a true open source project. We now have qt-pr...

RSS Recent releases

Release Notes: The new Qt Quick Controls and Qt Quick Layouts modules finally offer ‘widgets’ for Qt Quick. Qt Sensors has now been added to Qt 5.1, supporting Android, Blackberry, and iOS. Qt Serial Port lets you interface with physical and virtual serial ports of your device to allow easy access to your hardware peripherals through a common cross-platform API. Qt X11 Extras provide you direct access to screen information on platforms running the X server.

  •  12 Apr 2013 01:07

Release Notes: Qt 5.0.2 brings over 600 improvements compared to Qt 5.0.1. Qt Creator 2.7.0 is included in the release package. You can now easily skip modules in configure when building Qt yourself. Static linking now works correctly for the Qt libraries.

Release Notes: This version represents a major overhaul of the C++ GUI programming framework. Key benefits include graphics quality improvements, higher performance on constrained hardware, cross-platform portability, support for C++11, HTML5 support with QtWebKit 2, a vastly improved QML engine with new APIs, and ease of use and compatibility with Qt 4 versions.

Release Notes: This release adds over 100 functional improvements, updates WebKit to version 2.2.2 and libpng to version 1.5.10, and adds 30 improvements to documentation and tools.

Release Notes: Qt Platform Abstraction (QPA) restructures the GUI stack to enable easier porting of Qt to different windowing systems and devices. Threaded OpenGL enables rendering OpenGL from more than one thread concurrently. HTTP requests are now handled in a separate thread by default. The filesystem stack received some heavy lifting under the hood. The result is better I/O performance.

RSS Recent comments

05 May 2011 10:58 jrepin Thumbs up

The best GUI toolkit ever. And so much more.

07 Feb 2005 06:23 rwmcgwier

Re: QT/Windows/Free
Great News!


07 Feb 2005 05:54 bero Thumbs up

Re: QT/Windows/Free

> When that is available, call me.

This has been announced today:


From: Trolltech Information

To: qt-interest@trolltech.com

Date: 2005-02-07 14:23:52

Dear Qt User/Qt Customer:

Trolltech is pleased to announce that we intend to

make Qt 4 for Windows

available under our successful dual licensing

business model.  This means that

Open Source projects under the GNU GPL license

will be able to target all

major operating systems using Qt 4. We plan to

release the Windows Open Source

version of Qt at the same time as Qt 4.


So now everyone can finally stop using that inferior

toolkit with 3 letters ;)

07 Jan 2005 01:20 atomice

Re: QT/Windows/Free

> When that is available, call me.

It already is: kde-cygwin.sourceforge...

01 Apr 2004 15:48 rwmcgwier

When that is available, call me.


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