A Note on Licensing

Trolltech's dual license policy provides versions of Qt and Qtopia under the terms of the GNU General Public License (GPL). Commercial, proprietary source projects working with Qt must always use the commercial version of Qt throughout their development process. The GPL versions can be downloaded free of charge and are provided without support or warranty. They are subject to the terms and conditions of the GPL. Read the more in the Open Source download FAQ.

Start on the Right Foot
Remember, you must purchase a Commercial License before beginning a proprietary development project.  The Commercial License does not allow you to incorporate code developed with the Open Source Editions of Trolltech software into a proprietary project. This means that you cannot begin proprietary development with the Open Source Edition, and then purchase a Commercial License later. 
If you intend to use Qt or Qtopia for a proprietary project, please go to the Commercial Downloads Page.

Choose Your Download

Qt Open Source Edition for C++ Developers

Provide Feedback on Pre-Release Software

Qtopia Open Source Edition Downloads

Qt Jambi Open Source Edition for Java Developers

Other Software Available for Download

Qt Open Source Edition for C++ Developers - Desktop 

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	Qt Open Source Edition for C++ Developers: Windows Download Qt is a cross-platform application development framework.  The Open Source Edition of Qt is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.
	Qt Open Source Edition for C++ Developers: Mac Download Qt is a cross-platform application development framework.  The Open Source Edition of Qt is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.
	Qt Open Source Edition for C++ Developers: X11 Download Qt is a cross-platform application development framework.  The Open Source Edition of Qt is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.

Qt Open Source Edition for C++ Developers - Embedded 

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	Qt Open Source Edition for C++ Developers: Windows CE  Download Qt for Windows® CE enables developers to write rich and high performance applications using an intuitive API available for a wide range of devices.  The Open Source Edition of Qt is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.
	Qt Open Source Edition for C++ Developers: Embedded Linux Download Qt for Embedded Linux (formerly known as Qtopia Core) is an application framework for single-purpose devices powered by embedded Linux.  The Open Source Edition of Qt for Embedded Linux is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.

Qtopia Open Source Edition Downloads 

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Qtopia Phone Edition - Open Source The Qtopia Phone Edition - Open Source is a complete package of the Qtopia Phone Edition source code. It includes an extensive source code for Qtopia applications and libraries. With Qtopia Phone Edition - Open Source you can use support provided by the community at qtopia.net. Commercial support and warranty from Trolltech is only available with the commercial licensing variants. The Qtopia Phone Edition - Open Source is provided under the GNU General Public License v2.0.

Provide Feedback on Pre-Release Software 

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	Qt Jambi 4.4 Preview Qt Jambi 4.4 is the upcoming feature release of Trolltech's leading cross-platform development framework for Java developers.  The preview version of Qt is now available for testing and feedback.  Binary preview packages are available for Windows, Mac, and Linux/X11. In addition a source code package and updated Eclipse Integration packages are provided.

Qt Jambi Open Source Edition for Java Developers  

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	Qt Jambi Open Source Edition for Java Developers: Windows Binary Qt Jambi is a cross-platform application development framework for Java.  The Open Source Edition of Qt Jambi is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.
	Qt Jambi Open Source Edition for Java Developers: Mac Binary Qt Jambi is a cross-platform application development framework for Java.  The Open Source Edition of Qt Jambi is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.
	Qt Jambi Open Source Edition for Java Developers: X11 Binary, 32 Bit Qt Jambi is a cross-platform application development framework for Java.  The Open Source Edition of Qt Jambi is available to open source developers under the terms of the GPL, and is not intended for commercial, proprietary source projects.
	Qt Jambi Open Source Edition for Java Developers: X11 Binary, 64 Bit Qt Jambi is a cross-platform application development framework for Java.  The Open Source Edition of Qt Jambi is available to open source developers under the terms of the GPL version 2.0, and is not intended for commercial, proprietary source projects.
	Qt Jambi Open Source Edition for Java Developers: Source Package All Platforms - Zip Download Qt Jambi is a cross-platform application development framework for Java.  The Open Source Edition of Qt Jambi is available to open source developers under the terms of the GPL version 2.0, and is not intended for commercial, proprietary source projects.
	Qt Jambi Open Source Edition for Java Developers: Source Package All Platforms - Tar.gz Download Qt Jambi is a cross-platform application development framework for Java.  The Open Source Edition of Qt Jambi is available to open source developers under the terms of the GPL version 2.0, and is not intended for commercial, proprietary source projects.

Other Software Available for Download 

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	Qt Eclipse Integration for C++ and Java Developers The Qt Eclipse Integration allows programmers to create, build, debug and run Qt applications from within the Eclipse IDE.  Integrations are available for Qt C++ on top of the Eclipse C/C++ Development Tooling (CDT) plug-in, and for Java™ programmers through Qt Jambi.
	Qtopia Desktop Qtopia Desktop is Trolltech's cross-platform desktop PIM suite, which synchronizes with Qtopia Phone Edition 2.2. The executable Desktop program is available for free download.
	Qt Development Snapshots Snapshots are the very latest, often unstable versions of Qt software currently under development. We recommend that you do not use snapshots for product development, especially if you are under budget or schedule constraints.