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# Qtopia Free Edition: GPL Source Code and SDK

- Introduction
- GPL Source Code and SDK
  - Online Availability
  - Licensing Conditions
- More Information

## Introduction

Free software comes with a license giving users certain rights. In particular the rights to use the software, modify it, obtain its source, and to pass it on under the same terms. In this context the the term "free" is about rights, not money. The Free Software Foundation (creators of the GNU GPL) refer to free in the sense of freedom not price.

## GPL Source Code and SDK

Trolltech supports the free software concept by providing the Qtopia GPL source code and SDK. You can use this edition of Qtopia to create free software, i.e. software that is licensed under the GNU GPL or a similarly recognized open source license. The freely downloadable version of Qtopia is provided with no support and no warranty. It is provided under the GNU General Public License, GPL and may only be used in conjunction with the GPL version of Qt/Embedded. The Qtopia GPL contains the requisite Linux libraries and headers for Open Source, GPL Qtopia development. Qt/Embedded 2.3.10 and the latest TMake tools are also required.

The Qtopia GPL SDKs are available for:

- Red Hat 9
- SuSE 7
- SuSE 8.0
- SuSE 8.2

### Online Availability

The Free Edition can be downloaded from here: http://www.trolltech.com/download/qtopia/index.html

### Licensing Conditions

If you use the Qtopia Free Edition, there are certain licensing conditions that the GNU GPL imposes on you to ensure that your users enjoy the freedoms guaranteed by the GPL. Users are entitled to:

- Run your software for any purpose.
- Obtain and study your software's source code, and adapt it to their needs.
- Redistribute your software and its source code to others under the same terms.
- Improve or modify your software, and release these changes to the public.

These freedoms apply to all the source code for all the modules your software is based on, regardless of whether they have been written by you or by others. The freedoms also apply to any associated interface definition files and include the scripts and control files used to control compilation and installation of the executable. This last freedom is necessary to ensure that users can exercise their rights.

This means the Qtopia Free Edition cannot be used to develop software that will incorporate modules imposing conditions contradicting those of the GNU GPL. The GNU GPL conditions relate to, but are not limited to, software patents, commercial license agreements, copyrighted interface definitions and any sort of non-disclosure agreements. If your software is going to conflict with any of these conditions then the Qtopia Free Edition is not appropriate and you must use one of the commercial editions of Qtopia.

## More Information

More information on Free and Open Source software is available online:

- GNU GPL http://www.gnu.org
- Open Source licensing http://www.opensource.org

Information about Qtopia Commercial License Agreements is available at http://www.trolltech.com/pricing.html or email sales@trolltech.com.

If you are in doubt what edition of Qtopia is right for your project, please contact info@trolltech.com.