Open source & commercial distribution

David Johnson david at
Fri Mar 1 03:18:40 UTC 2002

On Thursday 28 February 2002 03:38 am, Gerjon de Vries wrote:

> Hence we are striving for a license that allows:
> - Use of the library as open source (e.g. in the GPL kind of way; NOT
> LGPL). So derivative works should be open source, free, and copyleft again.
> - Use of the library in commercial products, in a way that assures that the
> commercial product itself can not be used as a developers tool that
> competes with our product. E.g. it does not include any source code, its
> license forbids adaptation and/or reselling, etc.

It sounds like a dual license may meet your needs. Checkout the GPL/QPL dual 
license that Trolltech uses for Qt. You might also consider a dual GPL/MPL, 
or even a straight MPL.

David Johnson
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