Dual Licensing model

libQGLViewer uses a Dual License business model for its software development library and offers licenses for two distinct purposes - commercial and open source development.

Quid Pro Quo

Dual Licensing is based on the principle of Quid Pro Quo - "something for something". In return for the advantages you realize from using libQGLViewer to create your application, we require that you do one of the following:

Why does libQGLViewer use dual licensing?

Since its inception libQGLViewer has had a very active open source community and has reached its current maturity and stability with the help of a worldwide community of like-minded developers. We like being an active member of the open source community and we are dedicated to remaining involved. By selling commercial licenses, we are able to staff a dedicated development team to ensure continued progress, quality enhancements and first-class technical support for developers using libQGLViewer products.

Which license shall you use?

Commercial license

This is the appropriate option if you are creating a proprietary application and you are not prepared to distribute and share your source code under the GPL.

Based on the Quid Pro Quo principle, if you wish to derive a commercial advantage by not releasing your application under an open source license, you must purchase a libQGLViewer commercial license.

Open Source License

libQGLViewer is an avid supporter of open source software. This is the appropriate option if you are creating an open source application with a license compatible with the GNU GPL license.

As a special exception to the terms and conditions of GPL, this open source license is also compatible with other licenses (QPL as used in CGAL for instance).

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