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Qt Free Edition License

This is the license of Qt Free Edition. It allows you to use Qt Free Edition free of charge for developing free software for the free software community.

The license for Qt Professional Edition is much less restricitive; suitable for development of commercial software.


QT FREE EDITION LICENSE

Copyright © 1992-1998 Troll Tech AS. All rights reserved.

This is the license for the latest version of Qt Free Edition; it covers private use, use of third-party application programs based on Qt, and development of free software for the free software community.

COPYRIGHT AND RESTRICTIONS

The Qt toolkit is a product of Troll Tech AS. The Qt Free Edition is limited to use with the X Window System.

You may copy this version of the Qt Free Edition provided that the entire archive is distributed unchanged and as a whole, including this notice.

You may use this version of the Qt Free Edition to compile, link and run application programs legally developed by third parties.

You may use the Qt Free Edition to create application programs provided that:

  • You accept this license.
  • Your software does not require modifications to Qt Free Edition.
  • You satisfy ONE of the following three requirements
    EITHER
    Users of your software can freely obtain source code for the software, freely modify the source code (possibly with restrictions on copyright notices, attributions and legal responsibility), and freely redistribute original or modified versions of the software.
    OR
    Your software is distributed under the GNU GENERAL PUBLIC LICENSE, version 2 or later, as defined by the Free Software Foundation.
    OR
    Your software is distributed under the GNU LIBRARY GENERAL PUBLIC LICENSE, version 2 or later, as defined by the Free Software Foundation.

If you are paid to develop something with Qt Free Edition or it is a part of your job the following conditions also apply:

  • Your software must not require libraries, programs, data or documentation that are not available outside your organization in order to compile or use.
  • If and when your organization starts using the software, you must notify Troll Tech AS of the following:
    • Your organization's name and purpose.
    • The software's name and purpose.
    • The software's license.
    • That your organization considers the software to be free software.

You may also use the Qt Free Edition to create reusable components (such as libraries) provided that you accept the terms above, and in addition that:

  • Your components' license includes the following text:
    [Your package] requires the Qt library, which is copyright Troll Tech AS. Freely distributable programs may generally use Qt Free Edition free of charge, see [README.QT] for details.
  • README.QT is distributed along with your components.
  • Qt Free Edition is not distributed as an integral part of your components.

LIMITATIONS OF LIABILITY

Troll Tech AS makes no obligation under this license to support or upgrade Qt Free Edition, or assist in the use of Qt Free Edition.

In no event shall Troll Tech AS be liable for any lost revenue or profits or other direct, indirect, special, incidental or consequential damages, even if Troll Tech has been advised of the possibility of such damages.

QT FREE EDITION IS PROVIDED AS IS WITH NO WARRANTY OF ANY KIND, INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.



Copyright 1998 Troll Tech Trademarks Questions? Write to info@troll.no